Queue: speed up execution

lib/rsvp/queue.js

 import { Promise } from "./promise";
-import { delay } from "./timeout";
+import { resolve } from "./resolve";
 
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error
 function ResolvedQueueError(message) {
@@ -49,7 +49,7 @@ var Queue = function() {
     notify = progress;
   }, canceller);
 
-  promise_list.push(delay());
+  promise_list.push(resolve());
   promise_list.push(promise_list[0].then(function () {
     promise_list.splice(0, 2);
     if (promise_list.length === 0) {