Alas, --extra_execution_platforms didn't help.

Change-Id: I84064688f4a46aed413ffea82f017290fc3f7a54
Reviewed-on: https://code-review.googlesource.com/c/re2/+/62450
Reviewed-by: Perry Lorier <perryl@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>

python/setup.py

@@ -56,9 +56,6 @@ def build_extension(self, ext):
       cpu = os.environ['BAZEL_CPU']
       cmd.append(f'--cpu={cpu}')
       cmd.append(f'--platforms=//python:{cpu}')
-      if cpu == 'x64_x86_windows':
-        # Attempt to convince Bazel 7 that X64 can build for X86.
-        cmd.append('--extra_execution_platforms=//python:x64_windows')
     except KeyError:
       pass
     # Register the local Python toolchain with highest priority.