UC-21 Disable/remove push notifications from facebook Connect

The functionality for push notifications for Facebook connect has been broken for some time (see UC-20). This ticket cleans up all of the broken Facebook Connect code which had to do with pushing notifications, and removes all the references to that feature on the user facing side.

Ticket: https://wikia-inc.atlassian.net/browse/UC-21
Well, this is just a sample file and meant to be a reference, and it is under the FBConnect extension; I think it would be fine to keep it. We may re-implement this feature in the future, and actually make it work :)