Revert "Suppress duplicated-branches compiler warning in pack implementation"

This reverts commit 34585aa.

Author: Girgias

ext/standard/pack.c

@@ -1101,15 +1101,11 @@ PHP_FUNCTION(unpack)
 
 						v = php_unpack(&input[inputpos], 8, issigned, map);
 
-						/* GCC seems to think does are identical for some reason */
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wduplicated-branches"
 						if (type == 'q') {
 							v = (zend_long) v;
 						} else {
 							v = (zend_ulong) v;
 						}
-#pragma GCC diagnostic pop
 
 						add_assoc_long(return_value, n, v);
 						break;