Updated mediawiki/skins
Project: mediawiki/skins/CologneBlue  75d71afefad883ec7ae24b09225cd6ad408ab0fa

Remove "$useHeadElement = true"

It doesn't do anything since I13e25cc8 in core.

Change-Id: Id95b52f88dcbab08aa7b69198afdb8b029c18cba