Use typing_extensions.Self in the stdlib (#9694)

stdlib/socketserver.pyi

@@ -1,11 +1,11 @@
 import sys
 import types
 from _socket import _Address, _RetAddress
-from _typeshed import ReadableBuffer, Self
+from _typeshed import ReadableBuffer
 from collections.abc import Callable
 from socket import socket as _socket
 from typing import Any, BinaryIO, ClassVar
-from typing_extensions import TypeAlias
+from typing_extensions import Self, TypeAlias
 
 __all__ = [
     "BaseServer",
@@ -43,13 +43,13 @@ class BaseServer:
     socket_type: int
     timeout: float | None
     def __init__(
-        self: Self, server_address: _Address, RequestHandlerClass: Callable[[Any, _RetAddress, Self], BaseRequestHandler]
+        self, server_address: _Address, RequestHandlerClass: Callable[[Any, _RetAddress, Self], BaseRequestHandler]
     ) -> None: ...
     # It is not actually a `@property`, but we need a `Self` type:
     @property
-    def RequestHandlerClass(self: Self) -> Callable[[Any, _RetAddress, Self], BaseRequestHandler]: ...
+    def RequestHandlerClass(self) -> Callable[[Any, _RetAddress, Self], BaseRequestHandler]: ...
     @RequestHandlerClass.setter
-    def RequestHandlerClass(self: Self, val: Callable[[Any, _RetAddress, Self], BaseRequestHandler]) -> None: ...
+    def RequestHandlerClass(self, val: Callable[[Any, _RetAddress, Self], BaseRequestHandler]) -> None: ...
     def fileno(self) -> int: ...
     def handle_request(self) -> None: ...
     def serve_forever(self, poll_interval: float = 0.5) -> None: ...
@@ -63,7 +63,7 @@ class BaseServer:
     def server_activate(self) -> None: ...
     def server_bind(self) -> None: ...
     def verify_request(self, request: _RequestType, client_address: _RetAddress) -> bool: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: types.TracebackType | None
     ) -> None: ...
@@ -76,7 +76,7 @@ class TCPServer(BaseServer):
         allow_reuse_port: bool
     server_address: _AfInetAddress  # type: ignore[assignment]
     def __init__(
-        self: Self,
+        self,
         server_address: _AfInetAddress,
         RequestHandlerClass: Callable[[Any, _RetAddress, Self], BaseRequestHandler],
         bind_and_activate: bool = True,
@@ -91,7 +91,7 @@ if sys.platform != "win32":
     class UnixStreamServer(BaseServer):
         server_address: _AfUnixAddress  # type: ignore[assignment]
         def __init__(
-            self: Self,
+            self,
             server_address: _AfUnixAddress,
             RequestHandlerClass: Callable[[Any, _RetAddress, Self], BaseRequestHandler],
             bind_and_activate: bool = True,
@@ -100,7 +100,7 @@ if sys.platform != "win32":
     class UnixDatagramServer(BaseServer):
         server_address: _AfUnixAddress  # type: ignore[assignment]
         def __init__(
-            self: Self,
+            self,
             server_address: _AfUnixAddress,
             RequestHandlerClass: Callable[[Any, _RetAddress, Self], BaseRequestHandler],
             bind_and_activate: bool = True,