--- a/devtools/client/animationinspector/animation-controller.js
+++ b/devtools/client/animationinspector/animation-controller.js
@@ -12,17 +12,16 @@
 
 "use strict";
 
 var { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
 
 var { loader, require } = Cu.import("resource://devtools/shared/Loader.jsm", {});
 var { Task } = require("devtools/shared/task");
 
-loader.lazyRequireGetter(this, "promise");
 loader.lazyRequireGetter(this, "EventEmitter", "devtools/shared/event-emitter");
 loader.lazyRequireGetter(this, "AnimationsFront", "devtools/shared/fronts/animation", true);
 
 const { LocalizationHelper } = require("devtools/shared/l10n");
 const L10N =
       new LocalizationHelper("devtools/client/locales/animationinspector.properties");
 
 // Global toolbox/inspector, set when startup is called.

--- a/devtools/server/performance/recorder.js
+++ b/devtools/server/performance/recorder.js
@@ -2,17 +2,16 @@
  * 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";
 
 const { Cu } = require("chrome");
 const { Task } = require("devtools/shared/task");
 
 loader.lazyRequireGetter(this, "Services");
-loader.lazyRequireGetter(this, "promise");
 loader.lazyRequireGetter(this, "Class",
   "sdk/core/heritage", true);
 loader.lazyRequireGetter(this, "EventTarget",
   "sdk/event/target", true);
 loader.lazyRequireGetter(this, "events",
   "sdk/event/core");
 
 loader.lazyRequireGetter(this, "Memory",

--- a/devtools/shared/system.js
+++ b/devtools/shared/system.js
@@ -2,17 +2,16 @@
  * 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";
 
 const { Cc, Ci } = require("chrome");
 const { Task } = require("devtools/shared/task");
 
 loader.lazyRequireGetter(this, "Services");
-loader.lazyRequireGetter(this, "promise");
 loader.lazyRequireGetter(this, "defer", "devtools/shared/defer");
 loader.lazyRequireGetter(this, "OS", "resource://gre/modules/commonjs/node/os.js");
 loader.lazyRequireGetter(this, "DebuggerServer", "devtools/server/main", true);
 loader.lazyRequireGetter(this, "AppConstants",
   "resource://gre/modules/AppConstants.jsm", true);
 loader.lazyGetter(this, "screenManager", () => {
   return Cc["@mozilla.org/gfx/screenmanager;1"].getService(Ci.nsIScreenManager);
 });