* OutputPage::setSquidMaxage(); deprecated in 1.27
* OutputPage::readOnlyPage(); deprecated in 1.25
* OutputPage::rateLimited(); deprecated in 1.25
+* The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. Although HHVM 3.18.5 or later is supported,