One more attempt for util.py

The original `_handle_readonly` was flagged as not returning `object` even though the actual shutl.rmtree` does not use a return value.
So here we actually follow the requirements as seen by mymy iterally (which the local mymp in venv confirms to be correct).

pre_commit/util.py

@@ -206,14 +206,14 @@ def _handle_readonly(
         func: Callable[[str], object],
         path: str,
         exc: OSError,
-):
+) -> object:
     if (
             func in (os.rmdir, os.remove, os.unlink) and
             exc.errno in {errno.EACCES, errno.EPERM}
     ):
         for p in (path, os.path.dirname(path)):
             os.chmod(p, os.stat(p).st_mode | stat.S_IWUSR)
-        func(path)
+        return func(path)
     else:
         raise
 
@@ -223,8 +223,8 @@ if sys.version_info < (3, 12):  # pragma: <3.12 cover
         func: Callable[[str], object],
         path: str,
         excinfo: tuple[type[OSError], OSError, TracebackType],
-    ):
-        return _handle_readonly(func, path, excinfo[1])
+    ) -> None:
+        _handle_readonly(func, path, excinfo[1])
 
     def rmtree(path: str) -> None:
         shutil.rmtree(path, ignore_errors=False, onerror=_handle_readonly_old)