[3.12] gh-115091: Remove a left-over sentence that refers to Py_OptimizeFlag from ctypes documentation (GH-115092) (GH-115936)

Remove a left-over sentence that refers to an example that was present in Python 3.10 and was using ``Py_OptimizeFlag``.
(cherry picked from commit 915d7dd)

Co-authored-by: Antti Haapala <[email protected]>

Author: miss-islington

Doc/library/ctypes.rst

@@ -1113,10 +1113,6 @@ api::
    >>> print(hex(version.value))
    0x30c00a0
 
-If the interpreter would have been started with :option:`-O`, the sample would
-have printed ``c_long(1)``, or ``c_long(2)`` if :option:`-OO` would have been
-specified.
-
 An extended example which also demonstrates the use of pointers accesses the
 :c:data:`PyImport_FrozenModules` pointer exported by Python.