Delete Kokoro Linux C++ tests in favor of GHA.

These have already been migrated, this just deleted dead code

PiperOrigin-RevId: 506190214

kokoro/linux/bazel/common.cfg

@@ -1,31 +0,0 @@
-# Default setup for the all of our Kokoro builds.
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/bazel.sh"
-timeout_mins: 120
-
-env_vars {
-  key: "CONTAINER_IMAGE"
-  value: "us-docker.pkg.dev/protobuf-build/containers/test/linux/sanitize@sha256:dbd2f15fb69734d72c3fd10cb819bbe2ce4890acf49e9a2f9403983fe48e8807"
-}
-
-env_vars {
-  key: "BAZEL_TARGETS"
-  value: "//pkg/... //src/... @com_google_protobuf_examples//..."
-}
-
-env_vars {
-  key: "BAZEL_CONFIGS"
-  value: "opt dbg asan kokoro-msan tsan ubsan"
-}
-
-env_vars {
-  key: "BAZEL_EXTRA_FLAGS"
-  value: "--distinct_host_configuration=false"
-}
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.*"
-  }
-}

kokoro/linux/bazel/continuous.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.

kokoro/linux/bazel/presubmit.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.

kokoro/linux/bazel4/common.cfg

@@ -1,21 +0,0 @@
-# Default setup for the all of our Kokoro builds.
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/bazel.sh"
-timeout_mins: 120
-
-env_vars {
-  key: "CONTAINER_IMAGE"
-  value: "us-docker.pkg.dev/protobuf-build/containers/common/linux/bazel:4.2.3-3b71de326b62f67bf754c4dc4016d6a2fa9dd664"
-}
-
-env_vars {
-  key: "BAZEL_TARGETS"
-  value: "//src/..."
-}
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.*"
-  }
-}

kokoro/linux/bazel4/continuous.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.

kokoro/linux/bazel4/presubmit.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.

kokoro/linux/cpp_aarch64/common.cfg

@@ -1,21 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/bazel.sh"
-timeout_mins: 120
-
-env_vars {
-  key: "CONTAINER_IMAGE"
-  value: "us-docker.pkg.dev/protobuf-build/containers/test/linux/emulation:aarch64-e863f8ec6b1dfe41f7dc573bac9c8072a0a68b1b"
-}
-
-env_vars {
-  key: "BAZEL_TARGETS"
-  value: "//src/... //src/google/protobuf/compiler:protoc_aarch64_test"
-}
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.*"
-  }
-}

kokoro/linux/cpp_aarch64/continuous.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.

kokoro/linux/cpp_aarch64/presubmit.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.

kokoro/linux/cpp_tcmalloc/common.cfg

@@ -1,21 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/bazel.sh"
-timeout_mins: 1440
-
-env_vars {
-  key: "CONTAINER_IMAGE"
-  value: "us-docker.pkg.dev/protobuf-build/containers/test/linux/tcmalloc@sha256:9d975616c3fd44d5a091aeb60ee94f37e22fb367d471d258fc18cb4a2387c943"
-}
-
-env_vars {
-  key: "BAZEL_TARGETS"
-  value: "//src/..."
-}
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.*"
-  }
-}

kokoro/linux/cpp_tcmalloc/continuous.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.

kokoro/linux/cpp_tcmalloc/presubmit.cfg

@@ -1 +0,0 @@
-# Keep this file empty! Use common.cfg instead.