chore: avoid importing TYPE_CHECKING (#2864)

Assisted-by: OpenCode:glm-5.1

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

unit_test/get_platform_test.py

@@ -2,7 +2,6 @@ import contextlib
 import sys
 from collections.abc import Generator
 from pathlib import Path
-from typing import TYPE_CHECKING
 
 import pytest
 import setuptools._distutils.util
@@ -11,6 +10,8 @@ from cibuildwheel.ci import CIProvider, detect_ci_provider
 from cibuildwheel.errors import FatalError
 from cibuildwheel.platforms.windows import PythonConfiguration, setup_setuptools_cross_compile
 
+TYPE_CHECKING = False
+
 # monkeypatching os.name is too flaky. E.g. It works on my machine, but fails in pipeline
 if not sys.platform.startswith("win") and not TYPE_CHECKING:
     pytest.skip("Windows-only tests", allow_module_level=True)