Removed unused stuff

Also update the BadUsage / Dependency test!

Also add the $source class var to the PopulateInterwiki
class in populateInterwiki.php that was previously
undefined.
The usage can be seen on line 52,71 and 74 of the file!


Change-Id: Ic1a64772182a818d737c0f446b48b8e4af35d33e
Merge "Removed unused stuff"