Change-Id: I47a3afbb9f41e31f6b6d3f8e0a0608c068fa8445
Change-Id: I313db2d873bd7f6e6d32a5df42e0ffb5e88a3f41
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