Update typing_extensions imports in stdlib (#11244)

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

stdlib/gettext.pyi

@@ -2,8 +2,7 @@ import io
 import sys
 from _typeshed import StrPath
 from collections.abc import Callable, Container, Iterable, Sequence
-from typing import Any, Protocol, TypeVar, overload
-from typing_extensions import Final, Literal
+from typing import Any, Final, Literal, Protocol, TypeVar, overload
 
 __all__ = [
     "NullTranslations",