pythongh-102500: Remove mention of bytes shorthand

The bytes shorthand was removed in PEP 688:
https://peps.python.org/pep-0688/#no-special-meaning-for-bytes

I also remove the reference to `collections.abc.ByteString`, since that
object is deprecated (python#91896) and has different semantics (python#102092)

I think it would be good to backport this since the changes in the type
system are immediate and apply to all versions of Python.

Doc/library/typing.rst

@@ -2130,14 +2130,9 @@ Corresponding to collections in :mod:`collections.abc`
 
 .. class:: ByteString(Sequence[int])
 
-   A generic version of :class:`collections.abc.ByteString`.
-
    This type represents the types :class:`bytes`, :class:`bytearray`,
    and :class:`memoryview` of byte sequences.
 
-   As a shorthand for this type, :class:`bytes` can be used to
-   annotate arguments of any of the types mentioned above.
-
    .. deprecated:: 3.9
       Prefer :class:`collections.abc.Buffer`, or a union like ``bytes | bytearray | memoryview``.