Change-Id: Iaa60b44c5fc3b7498183ae1d5b9ba08ab54898d3
Change-Id: Ia76cf9c4fdcb18c374f152bff5629f85339c00bb
This is the final step of the process described at <https://www.mediawiki.org/wiki/Separating_skins_from_core_MediaWiki>. Corresponding core change: Idfc38503. Change-Id: I84fcf7ce6385b8323544cafe6912a00f1886d20d