A while back we began counting errors for Minerva. Now we have real error logging with stack traces the benefits of this are diminishing, we are shipping bytes to users that are unnecessary and the tooling should be removed.
Acceptance criteria
- Remove counting code from codebase.
- Document the deprecation of the configuration variables (done: https://www.mediawiki.org/w/index.php?title=Skin:Minerva_Neue&type=revision&diff=4201460&oldid=4200421&diffmode=source)
- Mark the legacy WebClientError schema as deprecated
- Remove the now-deprecated configuration variables from our production config https://gerrit.wikimedia.org/r/c/operations/mediawiki-config/+/649434