Updated mediawiki/extensions
Project: mediawiki/extensions/Math  f032265cee5623df4aee81f8ee2b9a9df8f2f18c

MathJax: Remove our RGB extension again, added in MathJax 2.1

Turns out that with the upgrade to 2.1 this is now included in core
MathJax, so we don't need the extension anymore.
http://docs.mathjax.org/en/latest/whats-new-2.1.html

Change-Id: I653c05aaf6d94851fdf6b1649d2d5c7477d46b7e