+* BREAKING CHANGE: The module 'mediawiki.legacy.IEFixes' has been removed as it was
+ unused. The file skins/common/IEFixes.js remains but is only used by wikibits.
+ The file never contained any re-usable components. To use it in a skin, load
+ 'mediawiki.legacy.wikibits' (which IEFixes depends on) and that will import
+ IEFixes automatically if user agent conditions are met.
+* Code specific to the Math extension was marked as deprecated.