UC-30,UC-31 Remove the facebook sync buttons from the user pref page

For the FB connect upgrade.

https://wikia-inc.atlassian.net/browse/UC-30
https://wikia-inc.atlassian.net/browse/UC-31
Hey @nmonterroso !  I made a change here because for some reason ```$this->query``` contained:
```php
[
   'cb' => null,
]
```
When this was run through ```http_build_query``` it was stripped entirely and we ended up with a URL ending with a '?' any no query string.

Later in the request an actual CB was added resulting in a url that looks like
```
http://vignette.wikia-dev.com/garth/images/f/f5/Temp_file_23910324_1415319689/revision/latest??cb=1415319689
```
THEN when some JS of ours sent a request to the backend with this URL using jQuery's $.ajax, the "??" was being converted to a big nasty blob of numbers because of a bug in jQuery:

  http://bugs.jquery.com/ticket/12326

The lesson here's, winners don't use drugs.