Updated mediawiki/skins
Project: mediawiki/skins/BlueSky  bc609b79076eab7703514bddebbfe97dbcda0bee

Removed code related to:
* previous versions of wikiHow's default skin
* certain wikiHow extensions (article rating system, author email notification, tracking of what social sharing links were clicked)
* old utility functions that nothing should use when we have jQuery readily available

Change-Id: Ie262bb7118a3d07bef2e1910d127ddde05972444