+* Hook ArticleAfterFetchContent (deprecated in 1.21) was removed.
+ Use ArticleAfterFetchContentObject instead.
+* Hook ArticleInsertComplete (deprecated in 1.21) was removed.
+ Use PageContentInsertComplete instead.
+* Hook ArticleSave (deprecated in 1.21) was removed.
+ Use PageContentSave instead.
+* Hook ArticleSaveComplete (deprecated in 1.21) was removed.
+ Use PageContentSaveComplete instead.
+* Hook EditFilterMerged (deprecated in 1.21) was removed.
+ Use EditFilterMergedContent instead.
+* Hook EditPageGetPreviewText (deprecated in 1.21) was removed.
+ Use EditPageGetPreviewContent instead.
+* Hook TitleIsCssOrJsPage (deprecated in 1.21) was removed.
+ Use ContentHandlerDefaultModelFor instead.
+* Hook TitleIsWikitextPage (deprecated in 1.21) was removed.
+ Use ContentHandlerDefaultModelFor instead.
+* Article::getContent() (deprecated in 1.21) was removed.
+* Revision::getText() (deprecated in 1.21) was removed.
+* Article::doEdit() and WikiPage::doEdit() (deprecated in 1.21) were removed.
+* Parser::replaceUnusualEscapes() (deprecated in 1.24) was removed.
+* Article::doEditContent() was marked as deprecated, to be removed in 1.30
+ or later.
+* ContentHandler::runLegacyHooks() was removed.
+* refreshLinks.php now can be limited to a particular category with --category=...
+ or a tracking category with --tracking-category=...
+* User-like objects that are passed to SpecialUserRights and its subclasses are
+ now required to have a getGroupMemberships() method. See UserRightsProxy for
+ an example.
+* User::$mGroups (instance variable) was marked private. Use User::getGroups()
+ instead.
+* User::getGroupName(), User::getGroupMember(), User:getGroupPage(),
+ User::makeGroupLinkHTML(), and User::makeGroupLinkWiki() were deprecated.
+ Use equivalent methods on the UserGroupMembership class.
+* Maintenance scripts and tests that call User::addGroup() must now ensure that
+ User objects have been added to the database prior to calling addGroup().
+* Protected function UsersPager::getGroups() was removed, and protected function
+ UsersPager::buildGroupLink() was changed from a static to an instance method.
+* The third parameter ($cache) to the UsersPagerDoBatchLookups hook was changed;
+ see docs/hooks.txt.
+* User::crypt() (deprecated in 1.24) was removed.
+* User::comparePasswords() (deprecated in 1.24) was removed.
+* ArchivedFile::getUserText() (deprecated in 1.23) was removed.
+* HTMLFileCache::newFromTitle() (deprecated in 1.24) was removed.