Use typing_extensions.Self instead of _typeshed.Self (#9702)

stubs/requests/requests/models.pyi

@@ -1,8 +1,8 @@
 import datetime
-from _typeshed import Self
 from collections.abc import Callable, Iterator
 from json import JSONDecoder
 from typing import Any
+from typing_extensions import Self
 
 from urllib3 import exceptions as urllib3_exceptions, fields, filepost, util
 
@@ -106,7 +106,7 @@ class Response:
     def __bool__(self) -> bool: ...
     def __nonzero__(self) -> bool: ...
     def __iter__(self) -> Iterator[bytes]: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(self, *args: object) -> None: ...
     @property
     def next(self) -> PreparedRequest | None: ...

stubs/requests/requests/sessions.pyi

@@ -1,7 +1,7 @@
-from _typeshed import Incomplete, Self, SupportsItems, SupportsRead
+from _typeshed import Incomplete, SupportsItems, SupportsRead
 from collections.abc import Callable, Iterable, Mapping, MutableMapping
 from typing import Any
-from typing_extensions import TypeAlias, TypedDict
+from typing_extensions import Self, TypeAlias, TypedDict
 
 from urllib3._collections import RecentlyUsedContainer
 
@@ -133,7 +133,7 @@ class Session(SessionRedirectMixin):
     adapters: MutableMapping[Any, Any]
     redirect_cache: RecentlyUsedContainer[Any, Any]
     def __init__(self) -> None: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(self, *args) -> None: ...
     def prepare_request(self, request: Request) -> PreparedRequest: ...
     def request(