So, extensions have all been cleaned up, there's just T147924 that needs addressing before removing the rest of the ContentHandler functions and hooks from core
A couple have mostly been removed, just need some followup documentation cleanup
Hooks:
- ArticleAfterFetchContent (Still mentioned in hooks.txt, code removed, but not in RELEASE-NOTES or HISTORY)
- ArticleInsertComplete
- ArticleSave
- ArticleSaveComplete
- ArticleViewCustom (Still mentioned in hooks.txt)
- EditFilterMerged
- EditPageGetPreviewText
- TitleIsCssOrJsPage
- TitleIsWikitextPage
Functions:
- Article::getContent()
- Article::doEdit() / WikiPage::doEdit()
- Revision::getText()
The rest of the hooks and function on T145728 should be marked as removed on the mediawiki.org Hook manual pages