Clean up unused includes

Some late spring cleaning ...

js/ui/telepathyClient.js

@@ -1,10 +1,8 @@
 /* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
 
-const Clutter = imports.gi.Clutter;
 const DBus = imports.dbus;
 const GLib = imports.gi.GLib;
 const Lang = imports.lang;
-const Shell = imports.gi.Shell;
 const Signals = imports.signals;
 const St = imports.gi.St;
 const Gettext = imports.gettext.domain('gnome-shell');