Internal changes

PiperOrigin-RevId: 686984077

.bazelignore

@@ -1,4 +1 @@
-# These are fetched as external repositories.
-third_party/abseil-cpp
-third_party/googletest
 _build/

.gitmodules

@@ -1,11 +0,0 @@
-[submodule "third_party/googletest"]
-	path = third_party/googletest
-	url = https://github.com/google/googletest.git
-	ignore = dirty
-[submodule "third_party/abseil-cpp"]
-	path = third_party/abseil-cpp
-	url = https://github.com/abseil/abseil-cpp.git
-	branch = lts_2023_08_02
-[submodule "third_party/jsoncpp"]
-	path = third_party/jsoncpp
-	url = https://github.com/open-source-parsers/jsoncpp.git