Update typing_extensions imports in third-party stubs (#11245)

stubs/beautifulsoup4/bs4/dammit.pyi

@@ -1,8 +1,7 @@
 from _typeshed import Incomplete
 from collections.abc import Iterable, Iterator
 from logging import Logger
-from typing import Any
-from typing_extensions import Literal
+from typing import Any, Literal
 
 def chardet_dammit(s): ...