Issue 4910, patch 2 of (probably) 3: pave the way for renaming of

nb_long:  remove last remaining use of nb_long
(in the struct module) from the core, set nb_long slots on all builtin
and extension types to 0, and remove uses of __long__ in test_complex
and test_binop.

Reviewed by Benjamin Peterson.

Objects/longobject.c

@@ -3830,7 +3830,7 @@ static PyNumberMethods long_as_number = {
 			long_xor,	/*nb_xor*/
 			long_or,	/*nb_or*/
 			long_long,	/*nb_int*/
-			long_long,	/*nb_long*/
+	0,				/*nb_long*/
 			long_float,	/*nb_float*/
 	0,				/* nb_inplace_add */
 	0,				/* nb_inplace_subtract */