[fix bug 1193592] Remove loading.gif source.
[fix bug 1193592] Remove loading.gif source.

mozilla/mozillians,brian-yang/mozillians,akatsoulas/mozillians,anistark/mozillians,akatsoulas/mozillians,brian-yang/mozillians,johngian/mozillians,akatsoulas/mozillians,johngian/mozillians,akatsoulas/mozillians,fxa90id/mozillians,johngian/mozillians,mozilla/mozillians,anistark/mozillians,fxa90id/mozillians,anistark/mozillians,anistark/mozillians,mozilla/mozillians,brian-yang/mozillians,fxa90id/mozillians,johngian/mozillians,brian-yang/mozillians,mozilla/mozillians,fxa90id/mozillians