remove docs for PyBytes_Format #4917

Doc/c-api/bytes.rst

@@ -192,9 +192,3 @@ called with a non-bytes parameter.
    reallocation fails, the original bytes object at *\*bytes* is deallocated,
    *\*bytes* is set to *NULL*, a memory exception is set, and ``-1`` is
    returned.
-
-
-.. cfunction:: PyObject* PyBytes_Format(PyObject *format, PyObject *args)
-
-   Return a new bytes object from *format* and *args*. Analogous to ``format %
-   args``.  The *args* argument must be a tuple.