* Language::getLanguageNames() was removed (deprecated since 1.20).
* Language::getTranslatedLanguageNames() was removed (deprecated since 1.20).
* Language::specialPage() was removed (deprecated since 1.24).
+* MediaWikiTestCase::assertException() was removed (deprecated since 1.22).
* OutputPage::getHeadItems() was removed (deprecated since 1.24).
* OutputPage::getScript() was removed (deprecated since 1.24).
* OutputPage::out() was removed (deprecated since 1.22).