Update typing_extensions imports in stdlib (#11244)

Co-authored-by: AlexWaygood <alex.waygood@gmail.com>

stdlib/msilib/__init__.pyi

@@ -1,8 +1,7 @@
 import sys
 from collections.abc import Container, Iterable, Sequence
 from types import ModuleType
-from typing import Any
-from typing_extensions import Literal
+from typing import Any, Literal
 
 if sys.platform == "win32":
     from _msi import *