Updated mediawiki/skins
Project: mediawiki/skins/Nimbus  1c020cb3096a8d7bebd15524292b0dfeaa7c36a7

Removing UserWelcome CSS

This has been available as
/extensions/SocialProfile/UserWelcome/UserWelcome.css for who knows how
many years.

Change-Id: I862b69669393f4139ad09d02b14cf2aad325ee81