Remove SimpleXMLElement dtor_obj handler

I don't see any reason why this cleanup needs to happen inside
dtor_obj.

If there is a reason, it's lacking in test coverage...

ext/simplexml/simplexml.c

@@ -2146,14 +2146,15 @@ sxe_object_clone(zend_object *object)
 }
 /* }}} */
 
-/* {{{ sxe_object_dtor() */
-static void sxe_object_dtor(zend_object *object)
+/* {{{ sxe_object_free_storage() */
+static void sxe_object_free_storage(zend_object *object)
 {
-	/* dtor required to cleanup iterator related data properly */
 	php_sxe_object *sxe;
 
 	sxe = php_sxe_fetch_object(object);
 
+	zend_object_std_dtor(&sxe->zo);
+
 	if (!Z_ISUNDEF(sxe->iter.data)) {
 		zval_ptr_dtor(&sxe->iter.data);
 		ZVAL_UNDEF(&sxe->iter.data);
@@ -2171,17 +2172,6 @@ static void sxe_object_dtor(zend_object *object)
 		zval_ptr_dtor(&sxe->tmp);
 		ZVAL_UNDEF(&sxe->tmp);
 	}
-}
-/* }}} */
-
-/* {{{ sxe_object_free_storage() */
-static void sxe_object_free_storage(zend_object *object)
-{
-	php_sxe_object *sxe;
-
-	sxe = php_sxe_fetch_object(object);
-
-	zend_object_std_dtor(&sxe->zo);
 
 	php_libxml_node_decrement_resource((php_libxml_node_object *)sxe);
 
@@ -2691,7 +2681,6 @@ PHP_MINIT_FUNCTION(simplexml)
 
 	memcpy(&sxe_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
 	sxe_object_handlers.offset = XtOffsetOf(php_sxe_object, zo);
-	sxe_object_handlers.dtor_obj = sxe_object_dtor;
 	sxe_object_handlers.free_obj = sxe_object_free_storage;
 	sxe_object_handlers.clone_obj = sxe_object_clone;
 	sxe_object_handlers.read_property = sxe_property_read;