* Don't require a Config instance to be passed in the constructor,
as that breaks skins that extend it.
* Don't manually register the skin with SkinFactory, use $wgValidSkinNames
Change-Id: Ie8539027c17caff35c1fc52a56676763df667fd9
They do more harm than good.
We still have the "HD" and "non-HD" styles, just no smooth transitions
between them.
Bug: T85614
Change-Id: I52dd9883eb4e7df00f0613182d4adaa3f28fe5b7