Clean up .bazelrc for MacOS.

PiperOrigin-RevId: 363494734
Change-Id: Ib45cf82d6d6f45b7089b1250dd4c2547b1a175cb

.bazelrc

@@ -101,11 +101,6 @@ build:libc++ --action_env=PATH
 build:libc++ --define force_libcpp=enabled
 build:libc++ --linkopt -fuse-ld=lld
 
-# Trigger --config=<host platform>, except when cross-compiling.
-build --enable_platform_specific_config
-build:android --noenable_platform_specific_config
-build:ios --noenable_platform_specific_config
-
 # Android configs. Bazel needs to have --cpu and --fat_apk_cpu both set to the
 # target CPU to build transient dependencies correctly. See
 # https://docs.bazel.build/versions/master/user-manual.html#flag--fat_apk_cpu
@@ -125,13 +120,7 @@ build:android_x86_64 --cpu=x86_64
 build:android_x86_64 --fat_apk_cpu=x86_64
 
 # Sets the default Apple platform to macOS.
-build:macos --apple_platform_type=macos
-
-# gRPC on MacOS requires this #define
-build:macos --copt=-DGRPC_BAZEL_BUILD
-
-# Settings for MacOS on ARM CPUs.
-build:macos_arm64 --cpu=darwin_arm64
+build --apple_platform_type=macos
 
 # iOS configs for each architecture and the fat binary builds.
 build:ios --apple_platform_type=ios
@@ -148,6 +137,11 @@ build:ios_x86_64 --cpu=ios_x86_64
 build:ios_fat --config=ios
 build:ios_fat --ios_multi_cpus=armv7,arm64,i386,x86_64
 
+# Enables all the macos config options for macos_arm64
+build:macos_arm64 --config=macos
+build:macos_arm64 --apple_platform_type=macos
+build:macos_arm64 --cpu=darwin_arm64
+
 # For projects which use TensorFlow as part of a Bazel build process, putting
 # nothing in a bazelrc will default to a monolithic build. The following line
 # opts in to modular op registration support by default.
@@ -268,6 +262,13 @@ build:c++1z --config=c++17
 build:c++17_gcc --cxxopt=-std=c++1z
 build:c++1z_gcc --config=c++17_gcc
 
+# Enable using platform specific build settings, except when cross-compiling for
+# mobile platforms.
+build --enable_platform_specific_config
+build:android --noenable_platform_specific_config
+build:ios --noenable_platform_specific_config
+build:macos_arm64 --noenable_platform_specific_config
+
 # Suppress C++ compiler warnings, otherwise build logs become 10s of MBs.
 build:android --copt=-w
 build:ios --copt=-w