diff --git a/kokoro/README.md b/kokoro/README.md
deleted file mode 100644
index 590d7bd36b..0000000000
--- a/kokoro/README.md
+++ /dev/null
@@ -1,12 +0,0 @@
-
-Kokoro Infrastructure
-----------------------
-
-The files in this directory serve as plumbing for running Protobuf
-tests under Kokoro, our internal CI.
-
-We have shared this part of our CI configuration in hopes that it is
-helpful to contributors who want to better understand the details of
-our test and release processes. If there are changes, please file an
-issue; unfortunately, we may not be able to accept PRs (but feel free
-to send one if it helps to explain the issue).
diff --git a/kokoro/docs/common.cfg b/kokoro/docs/common.cfg
deleted file mode 100644
index 771ca7f637..0000000000
--- a/kokoro/docs/common.cfg
+++ /dev/null
@@ -1,44 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "protobuf/kokoro/docs/trampoline.sh"
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/python-multi"
-}
-
-env_vars: {
-    key: "STAGING_BUCKET"
-    value: "docs-staging"
-}
-
-# Fetch the token needed for reporting release status to GitHub
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "yoshi-automation-github-key"
-    }
-  }
-}
-
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "docuploader_service_account"
-    }
-  }
-}
diff --git a/kokoro/docs/publish-python.sh b/kokoro/docs/publish-python.sh
deleted file mode 100755
index 9f8801757c..0000000000
--- a/kokoro/docs/publish-python.sh
+++ /dev/null
@@ -1,51 +0,0 @@
-#!/bin/bash
-# Adapted from https://github.com/googleapis/google-cloud-python/blob/main/.kokoro/publish-docs.sh
-
-set -eo pipefail
-
-# Disable buffering, so that the logs stream through.
-export PYTHONUNBUFFERED=1
-
-cd github/protobuf/python
-
-# install package
-sudo apt-get update
-sudo apt-get -y install software-properties-common
-sudo add-apt-repository universe
-sudo apt-get update
-sudo apt-get -y install unzip
-wget https://github.com/protocolbuffers/protobuf/releases/download/v21.1/protoc-21.1-linux-x86_64.zip
-unzip protoc-21.1-linux-x86_64.zip bin/protoc
-mv bin/protoc ../protoc
-python3 -m venv venv
-source venv/bin/activate
-python setup.py install
-
-# install docs dependencies
-python -m pip install -r docs/requirements.txt
-
-# build docs
-cd docs
-make html
-cd ..
-deactivate
-
-python3 -m pip install protobuf==4.21.1 gcp-docuploader==0.6.3
-
-# install a json parser
-sudo apt-get -y install jq
-
-# create metadata
-python3 -m docuploader create-metadata \
-  --name=$(jq --raw-output '.name // empty' .repo-metadata.json) \
-  --version=$(python3 setup.py --version) \
-  --language=$(jq --raw-output '.language // empty' .repo-metadata.json) \
-  --distribution-name=$(python3 setup.py --name) \
-  --product-page=$(jq --raw-output '.product_documentation // empty' .repo-metadata.json) \
-  --github-repository=$(jq --raw-output '.repo // empty' .repo-metadata.json) \
-  --issue-tracker=$(jq --raw-output '.issue_tracker // empty' .repo-metadata.json)
-
-cat docs.metadata
-
-# upload docs
-python3 -m docuploader upload docs/_build/html --metadata-file docs.metadata --staging-bucket docs-staging
diff --git a/kokoro/docs/python.cfg b/kokoro/docs/python.cfg
deleted file mode 100644
index 382f431ad2..0000000000
--- a/kokoro/docs/python.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Tell the trampoline which build file to use.
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/protobuf/kokoro/docs/publish-python.sh"
-}
diff --git a/kokoro/docs/trampoline.sh b/kokoro/docs/trampoline.sh
deleted file mode 100755
index 4cb78a564a..0000000000
--- a/kokoro/docs/trampoline.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-# Copied from https://github.com/googleapis/google-cloud-python/blob/main/.kokoro/trampoline.sh
-
-set -eo pipefail
-
-python3 "${KOKORO_GFILE_DIR}/trampoline_v1.py"  || ret_code=$?
-
-chmod +x ${KOKORO_GFILE_DIR}/trampoline_cleanup.sh
-${KOKORO_GFILE_DIR}/trampoline_cleanup.sh || true
-
-exit ${ret_code}
diff --git a/kokoro/release/collect_all_artifacts.cfg b/kokoro/release/collect_all_artifacts.cfg
deleted file mode 100644
index 3da1a7c49a..0000000000
--- a/kokoro/release/collect_all_artifacts.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-build_file: "protobuf/kokoro/release/collect_all_artifacts.sh"
-
-action {
-  define_artifacts {
-    regex: "github/protobuf/artifacts/**"
-  }
-}
diff --git a/kokoro/release/collect_all_artifacts.sh b/kokoro/release/collect_all_artifacts.sh
deleted file mode 100755
index 470dc3842d..0000000000
--- a/kokoro/release/collect_all_artifacts.sh
+++ /dev/null
@@ -1,67 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-# Change to repo root.
-cd $(dirname $0)/../..
-
-# Initialize any submodules.
-git config --global --add safe.directory '*'
-git submodule update --init --recursive
-
-# The directory with all resulting artifacts
-mkdir -p artifacts
-
-# Artifacts from all predecessor jobs get copied to this directory by kokoro
-INPUT_ARTIFACTS_DIR="${KOKORO_GFILE_DIR}/github/protobuf"
-
-# TODO(jtattermusch): remove listing the files, but for now it make it easier
-# to iterate on the script.
-ls -R ${INPUT_ARTIFACTS_DIR}
-
-# ====================================
-# Copy to expose all the artifacts from the predecessor jobs to the output
-# TODO(jtattermusch): the directory layout of the artifact builds is pretty messy,
-# so will be the output artifacts of this job.
-cp -r ${INPUT_ARTIFACTS_DIR}/* artifacts
-
-# ====================================
-# Build Google.Protobuf.Tools C# nuget
-# The reason it's being done in this script is that we need access to protoc binaries
-# built on multiple platform (the build is performed by the "build artifact" step)
-# and adding and extra chained build just for building the Google.Protobuf.Tools
-# nuget seems like an overkill.
-cd csharp
-mkdir -p protoc/windows_x86
-mkdir -p protoc/windows_x64
-cp ${INPUT_ARTIFACTS_DIR}/build32/Release/protoc.exe protoc/windows_x86/protoc.exe
-cp ${INPUT_ARTIFACTS_DIR}/build64/Release/protoc.exe protoc/windows_x64/protoc.exe
-
-mkdir -p protoc/linux_x86
-mkdir -p protoc/linux_x64
-# Because of maven unrelated reasonse the linux protoc binaries have a dummy .exe extension.
-# For the Google.Protobuf.Tools nuget, we don't want that exception, so we just remove it.
-cp ${INPUT_ARTIFACTS_DIR}/kokoro/release/protoc/target/linux/x86_32/protoc.exe protoc/linux_x86/protoc
-cp ${INPUT_ARTIFACTS_DIR}/kokoro/release/protoc/target/linux/x86_64/protoc.exe protoc/linux_x64/protoc
-
-mkdir -p protoc/macosx_x64
-cp ${INPUT_ARTIFACTS_DIR}/build64/src/protoc protoc/macosx_x64/protoc
-
-# Install nuget (will also install  mono)
-# TODO(jtattermusch): use "mono:5.14" docker image instead so we don't have to apt-get install
-sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
-echo "deb https://download.mono-project.com/repo/ubuntu stable-xenial main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
-# NVidia has stopped publishing Cuda packages for Ubuntu 16.04, so we need to
-# delete this file to allow the apt update to run successfully.
-sudo rm -f /etc/apt/sources.list.d/cuda.list
-sudo apt update
-sudo apt-get install -y nuget
-
-# Copy WKT protos to csharp directory.
-mkdir -p src/google/protobuf
-cp ../src/google/protobuf/*.proto src/google/protobuf/
-
-nuget pack Google.Protobuf.Tools.nuspec
-
-# Copy the nupkg to the output artifacts
-cp Google.Protobuf.Tools.*.nupkg ../artifacts
diff --git a/kokoro/release/csharp/windows/build_nuget.bat b/kokoro/release/csharp/windows/build_nuget.bat
deleted file mode 100644
index 590c391dd4..0000000000
--- a/kokoro/release/csharp/windows/build_nuget.bat
+++ /dev/null
@@ -1,17 +0,0 @@
-@rem enter repo root
-cd /d %~dp0\..\..\..\..
-
-cd csharp
-
-@rem Install dotnet SDK
-powershell -File install_dotnet_sdk.ps1
-set PATH=%LOCALAPPDATA%\Microsoft\dotnet;%PATH%
-
-@rem Disable some unwanted dotnet options
-set DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
-set DOTNET_CLI_TELEMETRY_OPTOUT=true
-
-@rem Work around https://github.com/dotnet/core/issues/5881
-dotnet nuget locals all --clear
-
-call build_packages.bat
diff --git a/kokoro/release/csharp/windows/common.cfg b/kokoro/release/csharp/windows/common.cfg
deleted file mode 100644
index f508c65bda..0000000000
--- a/kokoro/release/csharp/windows/common.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/release/csharp/windows/build_nuget.bat"
-timeout_mins: 60
-
-action {
-  define_artifacts {
-    regex: "**/*.nupkg"
-  }
-}
diff --git a/kokoro/release/csharp/windows/continuous.cfg b/kokoro/release/csharp/windows/continuous.cfg
deleted file mode 100644
index 8523c22536..0000000000
--- a/kokoro/release/csharp/windows/continuous.cfg
+++ /dev/null
@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.
diff --git a/kokoro/release/csharp/windows/presubmit.cfg b/kokoro/release/csharp/windows/presubmit.cfg
deleted file mode 100644
index 8523c22536..0000000000
--- a/kokoro/release/csharp/windows/presubmit.cfg
+++ /dev/null
@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.
diff --git a/kokoro/release/csharp/windows/release.cfg b/kokoro/release/csharp/windows/release.cfg
deleted file mode 100644
index f508c65bda..0000000000
--- a/kokoro/release/csharp/windows/release.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/release/csharp/windows/build_nuget.bat"
-timeout_mins: 60
-
-action {
-  define_artifacts {
-    regex: "**/*.nupkg"
-  }
-}
diff --git a/kokoro/release/protoc/build-protoc.sh b/kokoro/release/protoc/build-protoc.sh
deleted file mode 100755
index 504eadc269..0000000000
--- a/kokoro/release/protoc/build-protoc.sh
+++ /dev/null
@@ -1,249 +0,0 @@
-#!/bin/bash
-
-# Builds protoc executable into target/<OS>/<ARCH>/protoc.exe; optionally builds
-# protoc plugins into target/<OS>/<ARCH>/protoc-gen-*.exe
-#
-# Usage: ./build-protoc.sh <OS> <ARCH> <TARGET>
-#
-# <TARGET> can be "protoc" or "protoc-gen-javalite". Supported <OS> <ARCH>
-# combinations:
-#   HOST   <OS>    <ARCH>   <COMMENT>
-#   cygwin windows x86_32   Requires: i686-w64-mingw32-gcc
-#   cygwin windows x86_64   Requires: x86_64-w64-mingw32-gcc
-#   linux  linux   aarch_64 Requires: g++-aarch64-linux-gnu
-#   linux  linux   x86_32
-#   linux  linux   x86_64
-#   linux  windows x86_32   Requires: i686-w64-mingw32-gcc
-#   linux  windows x86_64   Requires: x86_64-w64-mingw32-gcc
-#   macos  osx     x86_32
-#   macos  osx     x86_64
-#   mingw  windows x86_32
-#   mingw  windows x86_64
-
-OS=$1
-ARCH=$2
-BAZEL_TARGET=$3
-
-if [[ $# < 3 ]]; then
-  echo "Not enough arguments provided."
-  exit 1
-fi
-
-if [[ $BAZEL_TARGET != protoc ]]; then
-    echo "Target ""$BAZEL_TARGET"" invalid."
-    exit 1
-fi
-
-# Under Cygwin, bash doesn't have these in PATH when called from Maven which
-# runs in Windows version of Java.
-export PATH="/bin:/usr/bin:$PATH"
-
-############################################################################
-# Helper functions
-############################################################################
-E_PARAM_ERR=98
-E_ASSERT_FAILED=99
-
-# Usage:
-fail()
-{
-  echo "ERROR: $1"
-  echo
-  exit $E_ASSERT_FAILED
-}
-
-# Usage: assertEq VAL1 VAL2 $LINENO
-assertEq ()
-{
-  lineno=$3
-  if [ -z "$lineno" ]; then
-    echo "lineno not given"
-    exit $E_PARAM_ERR
-  fi
-
-  if [[ "$1" != "$2" ]]; then
-    echo "Assertion failed:  \"$1\" == \"$2\""
-    echo "File \"$0\", line $lineno"    # Give name of file and line number.
-    exit $E_ASSERT_FAILED
-  fi
-}
-
-# Checks the artifact is for the expected architecture
-# Usage: checkArch <path-to-protoc>
-checkArch ()
-{
-  echo
-  echo "Checking file format ..."
-  if [[ "$OS" == windows || "$OS" == linux ]]; then
-    format="$(objdump -f "$1" | grep -o "file format .*$" | grep -o "[^ ]*$")"
-    echo Format=$format
-    if [[ "$OS" == linux ]]; then
-      host_machine="$(uname -m)";
-      if [[ "$ARCH" == x86_32 ]]; then
-        assertEq $format "elf32-i386" $LINENO
-      elif [[ "$ARCH" == x86_64 ]]; then
-        assertEq $format "elf64-x86-64" $LINENO
-      elif [[ "$ARCH" == aarch_64 ]]; then
-        assertEq $format "elf64-little" $LINENO
-      elif [[ "$ARCH" == s390_64 ]]; then
-	if [[ $host_machine == s390x ]];then
-	  assertEq $format "elf64-s390" $LINENO
-	else
-          assertEq $format "elf64-big" $LINENO
-	fi
-      elif [[ "$ARCH" == ppcle_64 ]]; then
-	if [[ $host_machine == ppc64le ]];then
-	  assertEq $format "elf64-powerpcle" $LINENO
-	else
-          assertEq $format "elf64-little" $LINENO
-	fi
-      else
-        fail "Unsupported arch: $ARCH"
-      fi
-    else
-      # $OS == windows
-      if [[ "$ARCH" == x86_32 ]]; then
-        assertEq $format "pei-i386" $LINENO
-      elif [[ "$ARCH" == x86_64 ]]; then
-        assertEq $format "pei-x86-64" $LINENO
-      else
-        fail "Unsupported arch: $ARCH"
-      fi
-    fi
-  elif [[ "$OS" == osx ]]; then
-    format="$(file -b "$1" | grep -o "[^ ]*$")"
-    echo Format=$format
-    if [[ "$ARCH" == x86_32 ]]; then
-      assertEq $format "i386" $LINENO
-    elif [[ "$ARCH" == x86_64 ]]; then
-      assertEq $format "x86_64" $LINENO
-    else
-      fail "Unsupported arch: $ARCH"
-    fi
-  else
-    fail "Unsupported system: $OS"
-  fi
-  echo
-}
-
-# Checks the dependencies of the artifact. Artifacts should only depend on
-# system libraries.
-# Usage: checkDependencies <path-to-protoc>
-checkDependencies ()
-{
-  if [[ "$OS" == windows ]]; then
-    dump_cmd='objdump -x '"$1"' | fgrep "DLL Name"'
-    white_list="KERNEL32\.dll\|msvcrt\.dll"
-  elif [[ "$OS" == linux ]]; then
-    host_machine="$(uname -m)";
-    dump_cmd='ldd '"$1"
-    if [[ "$ARCH" == x86_32 ]]; then
-      white_list="linux-gate\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|libgcc_s\.so\.1\|libstdc++\.so\.6\|ld-linux\.so\.2"
-    elif [[ "$ARCH" == x86_64 ]]; then
-      white_list="linux-vdso\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|libgcc_s\.so\.1\|libstdc++\.so\.6\|ld-linux-x86-64\.so\.2"
-    elif [[ "$ARCH" == s390_64 ]]; then
-      if [[ $host_machine != s390x ]];then
-        dump_cmd='objdump -p '"$1"' | grep NEEDED'
-      fi
-      white_list="linux-vdso64\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|libgcc_s\.so\.1\|libstdc++\.so\.6\|libz\.so\.1\|ld64\.so\.1"
-    elif [[ "$ARCH" == ppcle_64 ]]; then
-      if [[ $host_machine != ppc64le ]];then
-        dump_cmd='objdump -p '"$1"' | grep NEEDED'
-      fi
-      white_list="linux-vdso64\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|libgcc_s\.so\.1\|libstdc++\.so\.6\|libz\.so\.1\|ld64\.so\.2"
-    elif [[ "$ARCH" == aarch_64 ]]; then
-      dump_cmd='objdump -p '"$1"' | grep NEEDED'
-      white_list="libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|libgcc_s\.so\.1\|libstdc++\.so\.6\|ld-linux-aarch64\.so\.1"
-    fi
-  elif [[ "$OS" == osx ]]; then
-    dump_cmd='otool -L '"$1"' | fgrep dylib'
-    white_list="libz\.1\.dylib\|libstdc++\.6\.dylib\|libSystem\.B\.dylib"
-  fi
-  if [[ -z "$white_list" || -z "$dump_cmd" ]]; then
-    fail "Unsupported platform $OS-$ARCH."
-  fi
-  echo "Checking for expected dependencies ..."
-  eval $dump_cmd | grep -i "$white_list" || fail "doesn't show any expected dependencies"
-  echo "Checking for unexpected dependencies ..."
-  eval $dump_cmd | grep -i -v "$white_list"
-  ret=$?
-  if [[ $ret == 0 ]]; then
-    fail "found unexpected dependencies (listed above)."
-  elif [[ $ret != 1 ]]; then
-    fail "Error when checking dependencies."
-  fi  # grep returns 1 when "not found", which is what we expect
-  echo "Dependencies look good."
-  echo
-}
-############################################################################
-
-echo "Building protoc, OS=$OS ARCH=$ARCH TARGET=$BAZEL_TARGET"
-
-BAZEL_ARGS=("--dynamic_mode=off" "--compilation_mode=opt" "--copt=-g0" "--copt=-fpic")
-
-if [[ "$OS" == windows ]]; then
-  BAZEL_TARGET="${BAZEL_TARGET}.exe"
-fi
-
-if [[ "$(uname)" == CYGWIN* ]]; then
-  assertEq "$OS" windows $LINENO
-  # Use mingw32 compilers because executables produced by Cygwin compiler
-  # always have dependency on Cygwin DLL.
-  if [[ "$ARCH" == x86_64 ]]; then
-    CONFIGURE_ARGS="$CONFIGURE_ARGS --host=x86_64-w64-mingw32"
-  elif [[ "$ARCH" == x86_32 ]]; then
-    CONFIGURE_ARGS="$CONFIGURE_ARGS --host=i686-pc-mingw32"
-  else
-    fail "Unsupported arch by CYGWIN: $ARCH"
-  fi
-elif [[ "$(uname)" == MINGW32* ]]; then
-  assertEq "$OS" windows $LINENO
-  assertEq "$ARCH" x86_32 $LINENO
-elif [[ "$(uname)" == MINGW64* ]]; then
-  assertEq "$OS" windows $LINENO
-  assertEq "$ARCH" x86_64 $LINENO
-elif [[ "$(uname)" == Linux* ]]; then
-  if [[ "$OS" == linux ]]; then
-    BAZEL_ARGS+=("--config=linux-$ARCH")
-  elif [[ "$OS" == windows ]]; then
-    # Cross-compilation for Windows
-    if [[ "$ARCH" == x86_64 ]]; then
-      BAZEL_ARGS+=("--config=win64")
-    elif [[ "$ARCH" == x86_32 ]]; then
-      BAZEL_ARGS+=("--config=win32")
-    else
-      fail "Unsupported arch: $ARCH"
-    fi
-  else
-    fail "Cannot build $OS on $(uname)"
-  fi
-elif [[ "$(uname)" == Darwin* ]]; then
-  assertEq "$OS" osx $LINENO
-  # Make the binary compatible with OSX 10.7 and later
-  BAZEL_ARGS+=("--config=osx-$ARCH" "--macos_minimum_os=10.7")
-else
-  fail "Unsupported system: $(uname)"
-fi
-
-# Nested double quotes are unintuitive, but it works.
-cd "$(dirname "$0")"
-
-WORKING_DIR="$(pwd)"
-TARGET_FILE="target/$OS/$ARCH/$BAZEL_TARGET.exe"
-DOCKER_IMAGE=us-docker.pkg.dev/protobuf-build/release-containers/linux@sha256:85fd92cce31eb9446ca85d108b424b8167cea3469b58f2b9a9d30e37fc467a00
-gcloud components update --quiet
-gcloud auth configure-docker us-docker.pkg.dev --quiet
-
-tmpfile=$(mktemp -u) &&
-docker run --cidfile $tmpfile -v $WORKING_DIR/../../..:/workspace $DOCKER_IMAGE \
-    build //:$BAZEL_TARGET "${BAZEL_ARGS[@]}" &&
-mkdir -p $(dirname $TARGET_FILE) &&
-docker cp \
-  `cat $tmpfile`:/workspace/bazel-bin/$BAZEL_TARGET $TARGET_FILE || exit 1
-
-if [[ "$OS" == osx ]]; then
-  # Since Mac linker doesn't accept "-s", we need to run strip
-  strip $TARGET_FILE || exit 1
-fi
-
-checkArch $TARGET_FILE && checkDependencies $TARGET_FILE
diff --git a/kokoro/release/protoc/linux/build.sh b/kokoro/release/protoc/linux/build.sh
deleted file mode 100755
index a9d58b7c75..0000000000
--- a/kokoro/release/protoc/linux/build.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-
-# This is not the source of truth for release protoc executables, and will soon
-# be deprecated.
-
-set -ex
-
-# Change to repo root.
-cd $(dirname $0)/../../../..
-GIT_REPO_ROOT=$(pwd)
-
-# Initialize any submodules.
-git submodule update --init --recursive
-
-# Cross-build for aarch64, ppc64le and s390x. Note: we do these builds first to avoid
-# file permission issues. The Docker builds will create directories owned by
-# root, which causes problems if we try to add new artifacts to those
-# directories afterward.
-
-
-kokoro/release/protoc/build-protoc.sh linux aarch_64 protoc
-
-kokoro/release/protoc/build-protoc.sh linux ppcle_64 protoc
-
-kokoro/release/protoc/build-protoc.sh linux s390_64 protoc
-
-kokoro/release/protoc/build-protoc.sh linux x86_64 protoc
-
-kokoro/release/protoc/build-protoc.sh linux x86_32 protoc
diff --git a/kokoro/release/protoc/linux/release.cfg b/kokoro/release/protoc/linux/release.cfg
deleted file mode 100644
index 4d8b7b612f..0000000000
--- a/kokoro/release/protoc/linux/release.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-build_file: "protobuf/kokoro/release/protoc/linux/build.sh"
-
-action {
-  define_artifacts {
-    regex: "**/protoc.exe"
-  }
-}
diff --git a/kokoro/release/protoc/macos/build.sh b/kokoro/release/protoc/macos/build.sh
deleted file mode 100755
index 2a3143198f..0000000000
--- a/kokoro/release/protoc/macos/build.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-
-set -ex
-CXXFLAGS_COMMON="-std=c++14 -DNDEBUG -mmacosx-version-min=10.9"
-
-cd github/protobuf
-
-bazel build //:protoc --dynamic_mode=off
-mkdir -p build64/src
-cp bazel-bin/protoc build64/src/protoc
-file bazel-bin/protoc
-otool -L bazel-bin/protoc | grep dylib
diff --git a/kokoro/release/protoc/macos/release.cfg b/kokoro/release/protoc/macos/release.cfg
deleted file mode 100644
index da903d0316..0000000000
--- a/kokoro/release/protoc/macos/release.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# Configuration for Mac OSX protoc release builds
-build_file: "protobuf/kokoro/release/protoc/macos/build.sh"
-
-action {
-  define_artifacts {
-    regex: "**/protoc"
-  }
-}
diff --git a/kokoro/release/protoc/windows/build.bat b/kokoro/release/protoc/windows/build.bat
deleted file mode 100644
index 96a2be94a9..0000000000
--- a/kokoro/release/protoc/windows/build.bat
+++ /dev/null
@@ -1,62 +0,0 @@
-set generator32=Visual Studio 15
-set generator64=Visual Studio 15 Win64
-set vcplatform32=win32
-set vcplatform64=x64
-set configuration=Release
-
-echo Building protoc
-cd github\protobuf
-
-@rem Update Chocolatey
-choco upgrade -y --no-progress chocolatey
-choco install -y python --version 3.10.0
-choco install -y --no-progress --pre cmake
-
-@rem Enable long paths.
-Powershell.exe -Command "New-ItemProperty -Path HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem -Name LongPathsEnabled -Value 1 -PropertyType DWORD -Force"
-
-@rem Update git submodules.
-git submodule update --init --recursive
-
-@rem Select Visual Studio 2017.
-call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" x64
-
-@rem Convert Windows line breaks to Unix line breaks
-@rem This allows text-matching tests to pass
-@find . -type f -print0 | xargs -0 d2u
-
-@rem Use python3
-C:\python310\python.exe -m venv venv
-call venv\Scripts\activate.bat
-
-@rem Allow Bazel to create short paths.
-fsutil 8dot3name set 0
-
-@rem Reinstall Bazel due to corrupt installation in kokoro.
-bazel version
-choco install bazel -y -i --version 5.1.0
-bazel version
-
-@rem Regenerate stale files.
-bazel test //src:cmake_lists_staleness_test || call bazel-bin\src\cmake_lists_staleness_test.exe --fix
-bazel test //src/google/protobuf:well_known_types_staleness_test || call bazel-bin\src\google\protobuf\well_known_types_staleness_test.exe --fix
-
-set ABSL_ROOT_DIR=%cd%\third_party\abseil-cpp
-
-mkdir build32
-cd build32
-cmake -G "%generator32%" -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_BUILD_SHARED_LIBS=OFF -Dprotobuf_UNICODE=ON ..
-msbuild protobuf.sln /p:Platform=%vcplatform32% || goto error
-cd ..
-
-mkdir build64
-cd build64
-cmake -G "%generator64%" -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_BUILD_SHARED_LIBS=OFF -Dprotobuf_UNICODE=ON ..
-msbuild protobuf.sln /p:Platform=%vcplatform64% || goto error
-cd ..
-
-goto :EOF
-
-:error
-echo Failed!
-exit /b %ERRORLEVEL%
diff --git a/kokoro/release/protoc/windows/release.cfg b/kokoro/release/protoc/windows/release.cfg
deleted file mode 100644
index 0d0da8f133..0000000000
--- a/kokoro/release/protoc/windows/release.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# Configuration for Windows protoc release builds
-build_file: "protobuf/kokoro/release/protoc/windows/build.bat"
-
-action {
-  define_artifacts {
-    regex: "**/protoc.exe"
-  }
-}
diff --git a/kokoro/release/ruby/linux/build_artifacts.sh b/kokoro/release/ruby/linux/build_artifacts.sh
deleted file mode 100755
index 88555226b0..0000000000
--- a/kokoro/release/ruby/linux/build_artifacts.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-# change to repo root
-cd $(dirname $0)/../../../..
-
-source kokoro/release/ruby/linux/prepare_build.sh
-
-# ruby environment
-source kokoro/release/ruby/linux/ruby/ruby_build_environment.sh
-
-# build artifacts
-bash kokoro/release/ruby/linux/ruby/ruby_build.sh
diff --git a/kokoro/release/ruby/linux/common.cfg b/kokoro/release/ruby/linux/common.cfg
deleted file mode 100644
index dbc71b2ceb..0000000000
--- a/kokoro/release/ruby/linux/common.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# Configuration for Linux release builds
-build_file: "protobuf/kokoro/release/ruby/linux/build_artifacts.sh"
-
-action {
-  define_artifacts {
-    regex: "github/protobuf/artifacts/**"
-  }
-}
diff --git a/kokoro/release/ruby/linux/continuous.cfg b/kokoro/release/ruby/linux/continuous.cfg
deleted file mode 100644
index 8523c22536..0000000000
--- a/kokoro/release/ruby/linux/continuous.cfg
+++ /dev/null
@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.
diff --git a/kokoro/release/ruby/linux/prepare_build.sh b/kokoro/release/ruby/linux/prepare_build.sh
deleted file mode 100755
index 91d186898c..0000000000
--- a/kokoro/release/ruby/linux/prepare_build.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-
-# Move docker's storage location to scratch disk so we don't run out of space.
-echo 'DOCKER_OPTS="${DOCKER_OPTS} --graph=/tmpfs/docker"' | sudo tee --append /etc/default/docker
-# Use container registry mirror for pulling docker images (should make downloads faster)
-# See https://cloud.google.com/container-registry/docs/using-dockerhub-mirroring
-echo 'DOCKER_OPTS="${DOCKER_OPTS} --registry-mirror=https://mirror.gcr.io"' | sudo tee --append /etc/default/docker
-sudo service docker restart
-
-# All artifacts come here
-mkdir artifacts
-export ARTIFACT_DIR=$(pwd)/artifacts
diff --git a/kokoro/release/ruby/linux/presubmit.cfg b/kokoro/release/ruby/linux/presubmit.cfg
deleted file mode 100644
index 8523c22536..0000000000
--- a/kokoro/release/ruby/linux/presubmit.cfg
+++ /dev/null
@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.
diff --git a/kokoro/release/ruby/linux/release.cfg b/kokoro/release/ruby/linux/release.cfg
deleted file mode 100644
index dbc71b2ceb..0000000000
--- a/kokoro/release/ruby/linux/release.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# Configuration for Linux release builds
-build_file: "protobuf/kokoro/release/ruby/linux/build_artifacts.sh"
-
-action {
-  define_artifacts {
-    regex: "github/protobuf/artifacts/**"
-  }
-}
diff --git a/kokoro/release/ruby/linux/ruby/ruby_build.sh b/kokoro/release/ruby/linux/ruby/ruby_build.sh
deleted file mode 100755
index 34a85abc00..0000000000
--- a/kokoro/release/ruby/linux/ruby/ruby_build.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-# Build protoc
-use_bazel.sh 5.1.1
-bazel build //:protoc
-
-# The java build setup expects protoc in the root directory.
-cp bazel-bin/protoc .
-export PROTOC=$PWD/protoc
-
-# Pull in dependencies.
-git submodule update --init --recursive
-
-umask 0022
-pushd ruby
-gem install bundler -v 2.1.4
-bundle update && bundle exec rake gem:native
-ls pkg
-mv pkg/* $ARTIFACT_DIR
-popd
diff --git a/kokoro/release/ruby/linux/ruby/ruby_build_environment.sh b/kokoro/release/ruby/linux/ruby/ruby_build_environment.sh
deleted file mode 100755
index 87c0f75448..0000000000
--- a/kokoro/release/ruby/linux/ruby/ruby_build_environment.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/bin/bash
-
-set +ex
-[[ -s /etc/profile.d/rvm.sh ]] && . /etc/profile.d/rvm.sh
-set -e  # rvm commands are very verbose
-rvm --default use ruby-2.4.1
-# The version needs to be updated if the version specified in Gemfile.lock is changed
-gem install bundler -v '1.17.3'
-set -ex
diff --git a/kokoro/release/ruby/macos/build_artifacts.sh b/kokoro/release/ruby/macos/build_artifacts.sh
deleted file mode 100755
index a109d45b61..0000000000
--- a/kokoro/release/ruby/macos/build_artifacts.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-# change to repo root
-cd $(dirname $0)/../../../..
-
-# all artifacts come here
-mkdir artifacts
-export ARTIFACT_DIR=$(pwd)/artifacts
-
-# ruby environment
-bash kokoro/release/ruby/macos/ruby/ruby_build_environment.sh
-
-# build artifacts
-bash kokoro/release/ruby/macos/ruby/ruby_build.sh
diff --git a/kokoro/release/ruby/macos/common.cfg b/kokoro/release/ruby/macos/common.cfg
deleted file mode 100644
index cb1c08bb88..0000000000
--- a/kokoro/release/ruby/macos/common.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# Configuration for Mac OSX release builds
-build_file: "protobuf/kokoro/release/ruby/macos/build_artifacts.sh"
-
-action {
-  define_artifacts {
-    regex: "github/protobuf/artifacts/**"
-  }
-}
diff --git a/kokoro/release/ruby/macos/continuous.cfg b/kokoro/release/ruby/macos/continuous.cfg
deleted file mode 100644
index 8523c22536..0000000000
--- a/kokoro/release/ruby/macos/continuous.cfg
+++ /dev/null
@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.
diff --git a/kokoro/release/ruby/macos/presubmit.cfg b/kokoro/release/ruby/macos/presubmit.cfg
deleted file mode 100644
index 8523c22536..0000000000
--- a/kokoro/release/ruby/macos/presubmit.cfg
+++ /dev/null
@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.
diff --git a/kokoro/release/ruby/macos/release.cfg b/kokoro/release/ruby/macos/release.cfg
deleted file mode 100644
index cb1c08bb88..0000000000
--- a/kokoro/release/ruby/macos/release.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# Configuration for Mac OSX release builds
-build_file: "protobuf/kokoro/release/ruby/macos/build_artifacts.sh"
-
-action {
-  define_artifacts {
-    regex: "github/protobuf/artifacts/**"
-  }
-}
diff --git a/kokoro/release/ruby/macos/ruby/ruby_build.sh b/kokoro/release/ruby/macos/ruby/ruby_build.sh
deleted file mode 100755
index d13c12045e..0000000000
--- a/kokoro/release/ruby/macos/ruby/ruby_build.sh
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-# Build protoc
-bazel build //:protoc
-export PROTOC=$PWD/bazel-bin/protoc
-
-# Pull in dependencies.
-git submodule update --init --recursive
-
-umask 0022
-pushd ruby
-bundle update && bundle exec rake gem:native
-ls pkg
-mv pkg/* $ARTIFACT_DIR
-popd
diff --git a/kokoro/release/ruby/macos/ruby/ruby_build_environment.sh b/kokoro/release/ruby/macos/ruby/ruby_build_environment.sh
deleted file mode 100755
index c4d0ccc8b2..0000000000
--- a/kokoro/release/ruby/macos/ruby/ruby_build_environment.sh
+++ /dev/null
@@ -1,120 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-# Fix permissions
-sudo chown -R $(whoami) $HOME/.rvm/
-sudo chown -R $(whoami) /Library/Ruby/
-
-set +ex  # rvm script is very verbose and exits with errorcode
-
-# Fix permissions
-sudo chown -R $(whoami) $HOME/.rvm/
-sudo chown -R $(whoami) /Library/Ruby/
-
-source $HOME/.rvm/scripts/rvm
-set -e  # rvm commands are very verbose
-time rvm install 2.6.0
-rvm use 2.6.0
-gem install rake-compiler --no-document
-gem install bundler --no-document
-time rvm install 3.1.0
-rvm use 3.1.0
-gem install rake-compiler --no-document
-gem install bundler --no-document
-time rvm install 2.7.0
-rvm use 2.7.0 --default
-gem install rake-compiler --no-document
-gem install bundler --no-document
-rvm osx-ssl-certs status all
-rvm osx-ssl-certs update all
-set -ex
-
-rm -rf ~/.rake-compiler
-
-CROSS_RUBY=$(mktemp tmpfile.XXXXXXXX)
-CROSS_RUBY31=$(mktemp tmpfile.XXXXXXXX)
-
-
-curl https://raw.githubusercontent.com/rake-compiler/rake-compiler/72184e51779b6a3b9b8580b036a052fdc3181ced/tasks/bin/cross-ruby.rake > "$CROSS_RUBY"
-
-# See https://github.com/grpc/grpc/issues/12161 for verconf.h patch details
-patch "$CROSS_RUBY" << EOF
---- cross-ruby.rake	2020-12-11 11:17:53.000000000 +0900
-+++ patched	2020-12-11 11:18:52.000000000 +0900
-@@ -111,10 +111,12 @@
-     "--host=#{MINGW_HOST}",
-     "--target=#{MINGW_TARGET}",
-     "--build=#{RUBY_BUILD}",
--    '--enable-shared',
-+    '--enable-static',
-+    '--disable-shared',
-     '--disable-install-doc',
-+    '--without-gmp',
-     '--with-ext=',
--    'LDFLAGS=-pipe -s',
-+    'LDFLAGS=-pipe',
-   ]
-
-   # Force Winsock2 for Ruby 1.8, 1.9 defaults to it
-@@ -130,6 +132,7 @@
- # make
- file "#{build_dir}/ruby.exe" => ["#{build_dir}/Makefile"] do |t|
-   chdir File.dirname(t.prerequisites.first) do
-+    sh "test -s verconf.h || rm -f verconf.h"  # if verconf.h has size 0, make sure it gets re-built by make
-     sh MAKE
-   end
- end
-EOF
-
-cp $CROSS_RUBY $CROSS_RUBY31
-
-patch "$CROSS_RUBY31" << EOF
---- cross-ruby.rake	2022-03-04 11:49:52.000000000 +0000
-+++ patched	2022-03-04 11:58:22.000000000 +0000
-@@ -114,6 +114,7 @@
-     '--enable-static',
-     '--disable-shared',
-     '--disable-install-doc',
-+    '--with-coroutine=ucontext',
-     '--without-gmp',
-     '--with-ext=',
-     'LDFLAGS=-pipe',
-EOF
-
-MAKE="make -j8"
-
-set +x # rvm commands are very verbose
-rvm use 3.1.0
-set -x
-ruby --version | grep 'ruby 3.1.0'
-for v in 3.1.0 ; do
-  ccache -c
-  rake -f "$CROSS_RUBY31" cross-ruby VERSION="$v" HOST=x86_64-darwin MAKE="$MAKE"
-  # Disabled until it can be fixed: https://github.com/protocolbuffers/protobuf/issues/9804
-  # rake -f "$CROSS_RUBY31" cross-ruby VERSION="$v" HOST=aarch64-darwin MAKE="$MAKE"
-done
-
-set +x # rvm commands are very verbose
-rvm use 2.7.0
-set -x
-ruby --version | grep 'ruby 2.7.0'
-for v in 3.0.0 2.7.0 ; do
-  ccache -c
-  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=x86_64-darwin MAKE="$MAKE"
-  # Disabled until it can be fixed: https://github.com/protocolbuffers/protobuf/issues/9804
-  # rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=aarch64-darwin MAKE="$MAKE"
-done
-set +x
-rvm use 2.6.0
-set -x
-ruby --version | grep 'ruby 2.6.0'
-for v in 2.6.0 ; do
-  ccache -c
-  rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=x86_64-darwin MAKE="$MAKE"
-  # Disabled until it can be fixed: https://github.com/protocolbuffers/protobuf/issues/9804
-  # rake -f "$CROSS_RUBY" cross-ruby VERSION="$v" HOST=aarch64-darwin MAKE="$MAKE"
-done
-set +x
-rvm use 2.7.0
-set -x