Revert "Fix GH-22142: Assertion failure in zendi_try_get_long() on IS_UNDEF."

This reverts commit 9e1b285.

Author: devnexen

Zend/zend_operators.c

@@ -448,7 +448,6 @@ static zend_never_inline zend_long ZEND_FASTCALL zendi_try_get_long(const zval *
 				ZEND_ASSERT(Z_TYPE(dst) == IS_LONG);
 				return Z_LVAL(dst);
 			}
-		case IS_UNDEF:
 		case IS_RESOURCE:
 		case IS_ARRAY:
 			*failed = true;