correct asyncio.locks._ContextManagerMixin and _ContextManager types (#7124)

Co-authored-by: Akuli <[email protected]>
Co-authored-by: Alex Waygood <[email protected]>

Author: 3 people

stdlib/asyncio/locks.pyi

@@ -11,7 +11,6 @@ _T = TypeVar("_T")
 
 if sys.version_info >= (3, 9):
     class _ContextManagerMixin:
-        def __init__(self, lock: Lock | Semaphore) -> None: ...
         async def __aenter__(self) -> None: ...
         async def __aexit__(
             self, exc_type: type[BaseException] | None, exc: BaseException | None, tb: TracebackType | None
@@ -20,14 +19,13 @@ if sys.version_info >= (3, 9):
 else:
     class _ContextManager:
         def __init__(self, lock: Lock | Semaphore) -> None: ...
-        def __enter__(self) -> object: ...
+        def __enter__(self) -> None: ...
         def __exit__(self, *args: Any) -> None: ...
 
     class _ContextManagerMixin:
-        def __init__(self, lock: Lock | Semaphore) -> None: ...
         # Apparently this exists to *prohibit* use as a context manager.
-        def __enter__(self) -> object: ...
-        def __exit__(self, *args: Any) -> None: ...
+        # def __enter__(self) -> NoReturn: ... see: https://github.com/python/typing/issues/1043
+        # def __exit__(self, *args: Any) -> None: ...
         def __iter__(self) -> Generator[Any, None, _ContextManager]: ...
         def __await__(self) -> Generator[Any, None, _ContextManager]: ...
         async def __aenter__(self) -> None: ...