--- a/devtools/shared/defer.js
+++ b/devtools/shared/defer.js
@@ -1,17 +1,14 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
-// See bug 1273941 to understand this choice of promise.
-const Promise = require("promise");
-
 /**
  * Returns a deferred object, with a resolve and reject property.
  * https://developer.mozilla.org/en-US/docs/Mozilla/JavaScript_code_modules/Promise.jsm/Deferred
  */
 module.exports = function defer() {
   let resolve, reject;
   let promise = new Promise(function() {
     resolve = arguments[0];