No longer test Bazel against JDK 9 and 10.

Both are already EOL, not used as the default / native JDK for any stable Ubuntu release and for unknown reasons, Bazel's bazel_bootstrap_distfile_test has become recently flaky with JDK 9, to a point where presubmits often fail: https://github.com/bazelbuild/continuous-integration/issues/624

We are still testing against OpenJDK 8 and OpenJDK 11, which are both considered "LTS" releases, so we keep good test coverage for the two versions that are used by users.

PiperOrigin-RevId: 244831327
diff --git a/.bazelci/postsubmit.yml b/.bazelci/postsubmit.yml
index be73ed9..17ad57e 100644
--- a/.bazelci/postsubmit.yml
+++ b/.bazelci/postsubmit.yml
@@ -127,50 +127,6 @@
     - "-//src/test/shell/bazel:embedded_tools_deps_test"
     # TODO(twerth): Re-enable after java.desktop has been removed.
     - "-//src/test/shell/bazel:jdeps_test"
-  ubuntu1804_java9:
-    shell_commands:
-    - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#
-      android_ndk_repository/android_ndk_repository/' WORKSPACE
-    - rm -f WORKSPACE.bak
-    build_targets:
-    - "//src:bazel"
-    - "//src:bazel_jdk_minimal"
-    test_flags:
-    - "--test_timeout=1200"
-    test_targets:
-    - "--"
-    - "//scripts/..."
-    - "//src/test/..."
-    - "//src/tools/singlejar/..."
-    - "//third_party/ijar/..."
-    - "//tools/android/..."
-    - "//tools/aquery_differ/..."
-    # TODO(iirina): Re-enable after #7952 was released.
-    - "-//src/test/shell/bazel:embedded_tools_deps_test"
-    # TODO(twerth): Re-enable after java.desktop has been removed.
-    - "-//src/test/shell/bazel:jdeps_test"
-  ubuntu1804_java10:
-    shell_commands:
-    - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#
-      android_ndk_repository/android_ndk_repository/' WORKSPACE
-    - rm -f WORKSPACE.bak
-    build_targets:
-    - "//src:bazel"
-    - "//src:bazel_jdk_minimal"
-    test_flags:
-    - "--test_timeout=1200"
-    test_targets:
-    - "--"
-    - "//scripts/..."
-    - "//src/test/..."
-    - "//src/tools/singlejar/..."
-    - "//third_party/ijar/..."
-    - "//tools/android/..."
-    - "//tools/aquery_differ/..."
-    # TODO(iirina): Re-enable after #7952 was released.
-    - "-//src/test/shell/bazel:embedded_tools_deps_test"
-    # TODO(twerth): Re-enable after java.desktop has been removed.
-    - "-//src/test/shell/bazel:jdeps_test"
   ubuntu1804_java11:
     shell_commands:
     - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#
diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index f2e3c2c..3d78bd0 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -141,58 +141,6 @@
     - "-//src/tools/singlejar:zip64_test"
     # TODO(twerth): Re-enable after java.desktop has been removed.
     - "-//src/test/shell/bazel:jdeps_test"
-  ubuntu1804_java9:
-    shell_commands:
-    - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#
-      android_ndk_repository/android_ndk_repository/' WORKSPACE
-    - rm -f WORKSPACE.bak
-    build_targets:
-    - "//src:bazel"
-    - "//src:bazel_jdk_minimal"
-    test_flags:
-    - "--test_timeout=1200"
-    test_targets:
-    - "--"
-    - "//scripts/..."
-    - "//src/test/..."
-    - "//src/tools/execlog/..."
-    - "//src/tools/singlejar/..."
-    - "//src/tools/workspacelog/..."
-    - "//third_party/ijar/..."
-    - "//tools/android/..."
-    - "//tools/aquery_differ/..."
-    # Disable Slow Tests
-    - "-//src/test/shell/bazel:bazel_determinism_test"
-    # Re-enable once fixed: https://github.com/bazelbuild/bazel/issues/4663
-    - "-//src/test/shell/bazel/android:android_ndk_integration_test"
-    # TODO(twerth): Re-enable after java.desktop has been removed.
-    - "-//src/test/shell/bazel:jdeps_test"
-  ubuntu1804_java10:
-    shell_commands:
-    - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#
-      android_ndk_repository/android_ndk_repository/' WORKSPACE
-    - rm -f WORKSPACE.bak
-    build_targets:
-    - "//src:bazel"
-    - "//src:bazel_jdk_minimal"
-    test_flags:
-    - "--test_timeout=1200"
-    test_targets:
-    - "--"
-    - "//scripts/..."
-    - "//src/test/..."
-    - "//src/tools/execlog/..."
-    - "//src/tools/singlejar/..."
-    - "//src/tools/workspacelog/..."
-    - "//third_party/ijar/..."
-    - "//tools/android/..."
-    - "//tools/aquery_differ/..."
-    # Disable Slow Tests
-    - "-//src/test/shell/bazel:bazel_determinism_test"
-    # Re-enable once fixed: https://github.com/bazelbuild/bazel/issues/4663
-    - "-//src/test/shell/bazel/android:android_ndk_integration_test"
-    # TODO(twerth): Re-enable after java.desktop has been removed.
-    - "-//src/test/shell/bazel:jdeps_test"
   ubuntu1804_java11:
     shell_commands:
     - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#