Merge pull request #3252 from nakakura/promises-a-plus-fix

update promises-a-plus/promises-a-plus-tests.ts

promises-a-plus/promises-a-plus-tests.ts

@@ -2,8 +2,7 @@
 /// <reference path="../rx/rx.async.d.ts"/>
 /// <reference path="../es6-promise/es6-promise.d.ts"/>
 /// <reference path="../q/Q.d.ts"/>
-import When = require("../when/when");
-
+/// <reference path="../when/when"/>
 
 var thenNum: PromisesAPlus.Thenable<number>; 
 var thenStr: PromisesAPlus.Thenable<string>;