Bug 1300884 follow-up: Remove the last import of AlarmService.jsm a=merge

--HG--
extra : source : 14593086470494abab1401eba9304defa715170e

b2g/chrome/content/shell.js

@@ -7,7 +7,6 @@
 window.performance.mark('gecko-shell-loadstart');
 
 Cu.import('resource://gre/modules/ContactService.jsm');
-Cu.import('resource://gre/modules/AlarmService.jsm');
 Cu.import('resource://gre/modules/NotificationDB.jsm');
 Cu.import("resource://gre/modules/AppsUtils.jsm");
 Cu.import('resource://gre/modules/UserAgentOverrides.jsm');