Remove WORKSPACE support from Bazel builds

docs/build_mozc_in_osx.md

@@ -50,6 +50,7 @@ Building on Mac requires the following software.
   * Xcode 13 (macOS 13 SDK) or later
   * ⚠️Xcode Command Line Tools aren't sufficient.
 * [Bazel](https://docs.bazel.build/versions/master/install-os-x.html) for Bazel build
+  * Check [.bazelversion](../src/.bazelversion) about which Bazel version is tested.
 * Python 3.9 or later with the following pip module.
   * `requests`
 * CMake 3.18.4 or later (to build Qt6)

docs/build_mozc_in_windows.md

@@ -167,6 +167,7 @@ Note that you can specify `--qtdir=` option instead of `--noqt` in GYP phase sin
 Additional requirements:
 
 * [Bazel](https://bazel.build/)
+  * Check [.bazelversion](../src/.bazelversion) about which Bazel version is tested.
 * [MSYS2](https://github.com/msys2/msys2)
 
 After running `build_tools/update_deps.py` and `build_tools/build_qt.py`, run the following command instead of `build_mozc.py`:

src/.bazelrc

@@ -17,15 +17,6 @@ common:android      --config=android_env --define TARGET=oss_android
 common:oss_android  --config=android_env --define TARGET=oss_android
 common:prod_android --config=android_env --define TARGET=prod_android
 
-## Bzlmod options: Bzlmod is the default except for Android.
-common:linux_env   --config=bzlmod
-common:macos_env   --config=bzlmod
-common:windows_env --config=bzlmod
-common:android_env --config=bzlmod
-
-common:bzlmod --enable_bzlmod
-common:workspace --noenable_bzlmod
-
 ## Dev channel
 build:dev_channel --define CHANNEL=dev
 
@@ -74,9 +65,6 @@ build:windows_env --noincompatible_enable_cc_toolchain_resolution
 # Android specific options
 build:android_env --copt "-DOS_ANDROID"
 build:android_env --build_tag_filters=-noandroid
-test:android_env   --test_tag_filters=-noandroid
-
-## Android Blzmod specific options
-### --experimental_google_legacy_api is required for all platforms.
-build:bzlmod --experimental_google_legacy_api
+build:android_env --experimental_google_legacy_api
 build:android_env --experimental_enable_android_migration_apis
+test:android_env  --test_tag_filters=-noandroid