cleanup: Don't shadow variables

Having variables that share the same name in overlapping scopes is
confusing and error-prone, and is best avoided.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/805

js/ui/status/remoteAccess.js

@@ -28,7 +28,7 @@ class RemoteAccessApplet extends PanelMenu.SystemIndicator {
         this._indicator = null;
         this._menuSection = null;
 
-        controller.connect('new-handle', (controller, handle) => {
+        controller.connect('new-handle', (o, handle) => {
             this._onNewHandle(handle);
         });
     }