Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  436894c2c71e71c0b5814c7b7b74b1040eb1b64b

Remove dead helper code

None of these helpers are used anywhere so let's kill the code rather
than let it rot.

Change-Id: Ifdb9e1b24f618d7be388ea0e50ccb6ee69d7f5ca