Change-Id: I7d53a91b865c85cdb33872ce90db05a38a6b6188
Change-Id: I8ac0cc47319de1c368f04cbc183bf89c3def7e2b
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