Fix warn

Author: komyg

nova_vm/src/ecmascript/builtins/control_abstraction_objects/promise_objects/promise_constructor.rs

@@ -274,7 +274,7 @@ impl PromiseConstructor {
                 agent,
                 promise.unbind(),
                 PromiseReactionHandler::PromiseAll {
-                    index: index as u32,
+                    index,
                     promise_all: promise_all_record,
                 },
                 PromiseReactionHandler::Empty,