Change-Id: I4d499dbbcd0729f2d09ad63e61251f19fe991b5a
Change-Id: I375b30a4689d5b2dbd80b8cec84926b6f586a8ef
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