Audit stdlib object annotations (#9519)

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: ...