Splitting from T287380: Decide on the future of DPL, we can disable DPL from wikis that aren't using it.
In https://gerrit.wikimedia.org/r/c/708376 a tracking category was added to identify pages using DPL.
We now can run refreshLinks.php across wikis that currently have DPL enabled, forcing all pages to be reparsed outside the normal cycle to ensure all DPL pages get added to the category.
If there are still 0 pages in the category after that, the extension isn't being used and can be disabled on that wiki.
Related incident: