[3.13] Delete stale note about mp.Lock.acquire/SIGINT (GH-120929) (GH-122078)

Delete stale note about mp.Lock.acquire/SIGINT (GH-120929)
(cherry picked from commit 0dcbc83)

Co-authored-by: Andrey Mishchenko <[email protected]>

Author: miss-islington

Doc/library/multiprocessing.rst

@@ -1473,17 +1473,6 @@ object -- see :ref:`multiprocessing-managers`.
    On macOS, ``sem_timedwait`` is unsupported, so calling ``acquire()`` with
    a timeout will emulate that function's behavior using a sleeping loop.
 
-.. note::
-
-   If the SIGINT signal generated by :kbd:`Ctrl-C` arrives while the main thread is
-   blocked by a call to :meth:`BoundedSemaphore.acquire`, :meth:`Lock.acquire`,
-   :meth:`RLock.acquire`, :meth:`Semaphore.acquire`, :meth:`Condition.acquire`
-   or :meth:`Condition.wait` then the call will be immediately interrupted and
-   :exc:`KeyboardInterrupt` will be raised.
-
-   This differs from the behaviour of :mod:`threading` where SIGINT will be
-   ignored while the equivalent blocking calls are in progress.
-
 .. note::
 
    Some of this package's functionality requires a functioning shared semaphore