Audit stdlib object annotations (#9519)

stdlib/asyncio/events.pyi

@@ -1,6 +1,6 @@
 import ssl
 import sys
-from _typeshed import FileDescriptorLike, ReadableBuffer, Self, StrPath, WriteableBuffer
+from _typeshed import FileDescriptorLike, ReadableBuffer, Self, StrPath, Unused, WriteableBuffer
 from abc import ABCMeta, abstractmethod
 from collections.abc import Awaitable, Callable, Coroutine, Generator, Sequence
 from contextvars import Context
@@ -96,7 +96,7 @@ class AbstractServer:
     @abstractmethod
     def close(self) -> None: ...
     async def __aenter__(self: Self) -> Self: ...
-    async def __aexit__(self, *exc: object) -> None: ...
+    async def __aexit__(self, *exc: Unused) -> None: ...
     @abstractmethod
     def get_loop(self) -> AbstractEventLoop: ...
     @abstractmethod

stdlib/asyncio/locks.pyi

@@ -1,6 +1,6 @@
 import enum
 import sys
-from _typeshed import Self
+from _typeshed import Self, Unused
 from collections import deque
 from collections.abc import Callable, Generator
 from types import TracebackType
@@ -31,7 +31,7 @@ else:
     class _ContextManager:
         def __init__(self, lock: Lock | Semaphore) -> None: ...
         def __enter__(self) -> None: ...
-        def __exit__(self, *args: object) -> None: ...
+        def __exit__(self, *args: Unused) -> None: ...
 
     class _ContextManagerMixin:
         # Apparently this exists to *prohibit* use as a context manager.
@@ -104,7 +104,7 @@ if sys.version_info >= (3, 11):
     class Barrier(_LoopBoundMixin):
         def __init__(self, parties: int) -> None: ...
         async def __aenter__(self: Self) -> Self: ...
-        async def __aexit__(self, *args: object) -> None: ...
+        async def __aexit__(self, *args: Unused) -> None: ...
         async def wait(self) -> int: ...
         async def abort(self) -> None: ...
         async def reset(self) -> None: ...

stdlib/asyncio/runners.pyi

@@ -1,5 +1,5 @@
 import sys
-from _typeshed import Self
+from _typeshed import Self, Unused
 from collections.abc import Callable, Coroutine
 from contextvars import Context
 from typing import Any, TypeVar
@@ -18,7 +18,7 @@ if sys.version_info >= (3, 11):
     class Runner:
         def __init__(self, *, debug: bool | None = ..., loop_factory: Callable[[], AbstractEventLoop] | None = ...) -> None: ...
         def __enter__(self: Self) -> Self: ...
-        def __exit__(self, exc_type: object, exc_val: object, exc_tb: object) -> None: ...
+        def __exit__(self, exc_type: Unused, exc_val: Unused, exc_tb: Unused) -> None: ...
         def close(self) -> None: ...
         def get_loop(self) -> AbstractEventLoop: ...
         def run(self, coro: Coroutine[Any, Any, _T], *, context: Context | None = ...) -> _T: ...