Use typing_extensions.Self in the stdlib (#9694)

stdlib/zoneinfo/__init__.pyi

@@ -1,7 +1,8 @@
-from _typeshed import Self, StrPath
+from _typeshed import StrPath
 from collections.abc import Iterable, Sequence
 from datetime import datetime, timedelta, tzinfo
 from typing import Any, Protocol
+from typing_extensions import Self
 
 __all__ = ["ZoneInfo", "reset_tzpath", "available_timezones", "TZPATH", "ZoneInfoNotFoundError", "InvalidTZPathWarning"]
 
@@ -14,9 +15,9 @@ class ZoneInfo(tzinfo):
     def key(self) -> str: ...
     def __init__(self, key: str) -> None: ...
     @classmethod
-    def no_cache(cls: type[Self], key: str) -> Self: ...
+    def no_cache(cls, key: str) -> Self: ...
     @classmethod
-    def from_file(cls: type[Self], __fobj: _IOBytes, key: str | None = ...) -> Self: ...
+    def from_file(cls, __fobj: _IOBytes, key: str | None = ...) -> Self: ...
     @classmethod
     def clear_cache(cls, *, only_keys: Iterable[str] | None = ...) -> None: ...
     def tzname(self, __dt: datetime | None) -> str | None: ...