Remove third_party/java/langtools from the bazel binary.

This was part of #7472 but was reverted by mistake by 9192ee3

The bazel binary gets down to 94M. 😃

Progress on #6316.

Closes #7492.

PiperOrigin-RevId: 235003109

src/BUILD

@@ -119,7 +119,6 @@ py_binary(
 # The tools Bazel uses to compile Java.
 # TODO(#6316): Gradually remove the targets here.
 JAVA_TOOLS = [
-    "//third_party/java/jdk/langtools:test-srcs",
     "//third_party/java/proguard:embedded_tools",
     "//src/java_tools/buildjar/java/com/google/devtools/build/buildjar/jarhelper:srcs",
     "//src/tools/singlejar:embedded_tools",