Updated mediawiki/skins
Project: mediawiki/skins/Nimbus  81320ad4d4e3a86b216fde2667f624858928e4fb

Most of the UserBoard CSS is in the two .css files in /extensions/SocialProfile/UserBoard/ directory, so these rules aren't needed here

Change-Id: I70083918984367cedf449af40c0a987d90a59983