Change-Id: I7d9ea56ad4eb3ef9a366045c91f4e814752e2dec
Change-Id: I248fbd3a7d7aae8e9f2fca7065aa2a28bc324a42
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