Remove an obsolete workaround from .bazelrc

This follows up to my previous commit [1], which was added as a
temporary workaround while working on Bazel build for Windows (#google#948).

As of Bazel 7.3.2 with bzlmod enabled,

  --noincompatible_enable_cc_toolchain_resolution

looks to be no longer necessary. Let's remove it for simplicity.

 [1]: 5efa371

#codehealth

PiperOrigin-RevId: 681690120

Author: yukawa

src/.bazelrc

@@ -65,12 +65,6 @@ test:macos_env   --test_tag_filters=-nomac
 build:windows_env --build_tag_filters=-nowin
 test:windows_env   --test_tag_filters=-nowin
 
-# A temporary workaround to make "mozc_win_build_rule" work.
-# Note that "incompatible_enable_cc_toolchain_resolution" is now enabled by
-# default. See https://github.com/bazelbuild/bazel/issues/7260
-# TODO: Re-enable "incompatible_enable_cc_toolchain_resolution"
-build:windows_env --noincompatible_enable_cc_toolchain_resolution
-
 # Android specific options
 build:android_env --copt "-DOS_ANDROID"
 build:android_env --build_tag_filters=-noandroid