+* Skin::getUsableSkins() was removed (deprecated since 1.23).
+* LoadBalancer::pickRandom() was removed (deprecated in 1.21).
+* Article::getUndoText() and WikiPage::getUndoText were removed (deprecated since
+ 1.21).
+* DifferenceEngine::setText() was removed (deprecated in 1.21).
+* Title::newFromRedirectArray() was removed (deprecated in 1.21).
+* UserMailer::send() no longer accepts $replyto as the 5th argument and $contentType
+ as the 6th. These must be passed in the options array now.
+* Title::newFromRedirectRecurse() was removed (deprecated in 1.21).