+* Calling Database::begin() explicitly during an implicit transaction or when DBO_TRX
+ is set results in an exception. Calling Database::commit() explicitly for an implicit
+ transaction also results in an exception. Previously these were logged as errors.
+ The startAtomic() and endAtomic() methods, or AtomicSectionUpdate should be used
+ instead.
+* The global function wfOutputHandler() was removed, use the its replacement
+ MediaWiki\OutputHandler::handle() instead. The global function was only sometimes defined.
+ Its replacement is always available via the autoloader.
+* ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags, deprecated
+ in 1.28, have been removed. Use ::listSoftwareActivatedTags() and
+ ::listSoftwareDefinedTags() instead.
+* Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You
+ can use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
+* HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
+* The ProfileSection class, deprecated in 1.25 and unused, has been removed.