chore: use if TYPE_CHECKING: blocks (#2866)

unit_test/main_commands_test.py

@@ -1,13 +1,18 @@
+from __future__ import annotations
+
 import errno
 import shutil
 import sys
-from pathlib import Path
 
 import pytest
 
 import cibuildwheel.__main__ as main_module
 from cibuildwheel.__main__ import main
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from pathlib import Path
+
 
 def test_clean_cache_when_cache_exists(
     tmp_path: Path, monkeypatch: pytest.MonkeyPatch, capfd: pytest.CaptureFixture[str]