Removed redundant declaration of _PyLong_NumBits().
diff --git a/Include/longobject.h b/Include/longobject.h
index 8354963..209c082 100644
--- a/Include/longobject.h
+++ b/Include/longobject.h
@@ -53,7 +53,6 @@
 PyAPI_FUNC(int) _PyLong_Sign(PyObject *v);
 
 
-PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
 /* _PyLong_NumBits.  Return the number of bits needed to represent the
    absolute value of a long.  For example, this returns 1 for 1 and -1, 2
    for 2 and -2, and 2 for 3 and -3.  It returns 0 for 0.