* $wgValidateAllHtml was removed and will be ignored.
* $wgScriptExtension was removed (deprecated and ignored since 1.25).
See 1.25 release notes for more information.
+* $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
+ framework that it enables. Some extensions mistakenly used this to check
+ whether any AJAX functionality at all should be enabled, further making this
+ problematic to retain.
=== New features in 1.31 ===
* (T76554) User sub-pages named ….json are now protected in the same way that ….js
* (T185058) The 'name' value to tgprop for action=query&list=tags has been
removed. It has never made a difference in the output, the name was always
returned regardless.
+* The 'watch' and 'unwatch' parameters for action=move have been removed. They
+ were deprecated and also accidentally nonfunctional since 1.17 in 2010. Use
+ 'watchlist' instead.
=== Action API internal changes in 1.31 ===
* ApiBase::getProfileDBTime was removed (deprecated since 1.25)