diff --git a/devtools/client/shims/moz.build b/devtools/client/shims/moz.build
index 21b689af88f3..5f56ffbaac49 100644
--- a/devtools/client/shims/moz.build
+++ b/devtools/client/shims/moz.build
@@ -11,8 +11,3 @@
 EXTRA_JS_MODULES.devtools += [
     'gDevTools.jsm',
 ]
-
-# Extra compatibility layer for transitional URLs used for part of 44 cycle
-EXTRA_JS_MODULES.devtools.client.framework += [
-    'gDevTools.jsm',
-]
diff --git a/devtools/shared/apps/moz.build b/devtools/shared/apps/moz.build
index 8ab1a9eb9765..f5bba00fd4d1 100644
--- a/devtools/shared/apps/moz.build
+++ b/devtools/shared/apps/moz.build
@@ -5,6 +5,5 @@
 
 DevToolsModules(
     'app-actor-front.js',
-    'Devices.jsm',
-    'Simulator.jsm'
+    'Devices.jsm'
 )
diff --git a/devtools/shared/shims/Simulator.jsm b/devtools/shared/shims/Simulator.jsm
deleted file mode 100644
index 7fd4fef53d2f..000000000000
--- a/devtools/shared/shims/Simulator.jsm
+++ /dev/null
@@ -1,34 +0,0 @@
-/* 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";
-
-/**
- * This file only exists to support add-ons which import this module at a
- * specific path.
- */
-
-const Cu = Components.utils;
-
-const { Services } = Cu.import("resource://gre/modules/Services.jsm", {});
-
-const WARNING_PREF = "devtools.migration.warnings";
-if (Services.prefs.getBoolPref(WARNING_PREF)) {
-  const { Deprecated } = Cu.import("resource://gre/modules/Deprecated.jsm", {});
-  Deprecated.warning("This path to Simulator.jsm is deprecated.  Please use " +
-                     "Cu.import(\"resource://devtools/shared/" +
-                     "apps/Simulator.jsm\") to load this module.",
-                     "https://bugzil.la/912121");
-}
-
-this.EXPORTED_SYMBOLS = [
-  "Simulator",
-];
-
-const module =
-  Cu.import("resource://devtools/shared/apps/Simulator.jsm", {});
-
-for (let symbol of this.EXPORTED_SYMBOLS) {
-  this[symbol] = module[symbol];
-}
diff --git a/devtools/shared/shims/moz.build b/devtools/shared/shims/moz.build
index bee1c82ac6ef..e865e0158346 100644
--- a/devtools/shared/shims/moz.build
+++ b/devtools/shared/shims/moz.build
@@ -17,15 +17,9 @@ EXTRA_JS_MODULES.devtools += [
     'dbg-client.jsm',
     'event-emitter.js',
     'Loader.jsm',
-    'Simulator.jsm',
 ]
 
 # Extra compatibility layer for transitional URLs used for part of 44 cycle
 EXTRA_JS_MODULES.devtools.shared += [
-    'Console.jsm',
     'Loader.jsm',
 ]
-
-EXTRA_JS_MODULES.devtools.shared.apps += [
-    'Simulator.jsm',
-]