Last modified: 2014-01-27 01:02:34 UTC
Idea from bug 32603 comment 7: search around MediaWiki for "remove after 1.XX release" code and similar and kill that code (or file bugs to remember to remove the code later). Example: r104318 added "Do not release 1.19 with this." in a comment. Search for phrases like that.
Not really a bug but rather a "task" type.