diff --git a/devtools/client/framework/toolbox.js b/devtools/client/framework/toolbox.js
index 76707547649f..c09b2de92f8c 100644
--- a/devtools/client/framework/toolbox.js
+++ b/devtools/client/framework/toolbox.js
@@ -15,7 +15,7 @@ const SCREENSIZE_HISTOGRAM = "DEVTOOLS_SCREEN_RESOLUTION_ENUMERATED_PER_USER";
 const CURRENT_THEME_SCALAR = "devtools.current_theme";
 const HTML_NS = "http://www.w3.org/1999/xhtml";
 
-var {Ci, Cu, Cc} = require("chrome");
+var {Ci, Cc} = require("chrome");
 var promise = require("promise");
 var defer = require("devtools/shared/defer");
 var Services = require("Services");
diff --git a/devtools/shared/client/breakpoint-client.js b/devtools/shared/client/breakpoint-client.js
index 74bdd0e0c212..e77b1035c121 100644
--- a/devtools/shared/client/breakpoint-client.js
+++ b/devtools/shared/client/breakpoint-client.js
@@ -4,7 +4,6 @@
 
 "use strict";
 
-const { Cu } = require("chrome");
 const promise = require("devtools/shared/deprecated-sync-thenables");
 
 const eventSource = require("devtools/shared/client/event-source");
diff --git a/devtools/shared/client/debugger-client.js b/devtools/shared/client/debugger-client.js
index 76e6412ad0f1..3b180ad0cca4 100644
--- a/devtools/shared/client/debugger-client.js
+++ b/devtools/shared/client/debugger-client.js
@@ -4,7 +4,6 @@
 
 "use strict";
 
-const { Cu } = require("chrome");
 const Services = require("Services");
 const promise = require("devtools/shared/deprecated-sync-thenables");
 
diff --git a/devtools/shared/client/tab-client.js b/devtools/shared/client/tab-client.js
index 5b24c04cbb06..586dd3e9506c 100644
--- a/devtools/shared/client/tab-client.js
+++ b/devtools/shared/client/tab-client.js
@@ -4,7 +4,6 @@
 
 "use strict";
 
-const { Cu } = require("chrome");
 const promise = require("devtools/shared/deprecated-sync-thenables");
 
 const DevToolsUtils = require("devtools/shared/DevToolsUtils");
diff --git a/devtools/shared/client/thread-client.js b/devtools/shared/client/thread-client.js
index f15b2ad13472..7d3b9e0e085c 100644
--- a/devtools/shared/client/thread-client.js
+++ b/devtools/shared/client/thread-client.js
@@ -4,7 +4,6 @@
 
 "use strict";
 
-const { Cu } = require("chrome");
 const promise = require("devtools/shared/deprecated-sync-thenables");
 
 const DevToolsUtils = require("devtools/shared/DevToolsUtils");
diff --git a/devtools/shared/webconsole/throttle.js b/devtools/shared/webconsole/throttle.js
index dee336f88677..f2e06f372a7f 100644
--- a/devtools/shared/webconsole/throttle.js
+++ b/devtools/shared/webconsole/throttle.js
@@ -6,7 +6,7 @@
 
 "use strict";
 
-const {CC, Ci, Cu, Cc} = require("chrome");
+const {CC, Ci, Cc} = require("chrome");
 
 const ArrayBufferInputStream = CC("@mozilla.org/io/arraybuffer-input-stream;1",
                                   "nsIArrayBufferInputStream");