From the checklist at https://wikitech.wikimedia.org/wiki/Schema_changes:
# **ALTERs to run:** https://gerrit.wikimedia.org/r/c/mediawiki/core/+/482371/3/maintenance/archives/patch-drop-comment-fields.sql and https://gerrit.wikimedia.org/r/c/mediawiki/core/+/525605/8/maintenance/archives/patch-drop-user-fields.sql
# **Where to run those changes:** all.dblist
# **When to run those changes:** No time constraint.
# **If the schema change is backwards compatible:** Yes. The code no longer accesses these fields.
# **If the schema change has been tested already on some of the test/beta wikis:** It appears to have been auto-deployed to Beta. Things seem to be working, and if anyone has complained about things breaking I haven't heard it.
# **If the data should be made available on the labs replicas and/or dumps:** N/A, no new data is being added here. References to these fields from Labs replica views were removed in T212972 and T223406.
Progress:
[] s1
** [x] codfw
** [] eqiad
** [] Run maintain-views on labs hosts to recreate the views (`sudo /usr/local/sbin/maintain-views --databases jawiki --table protected_titles --replace-all`)
[x] s2
** [x] codfw
** [x] eqiad progress T233135#5578395
** [x] Run maintain-views on labs hosts to recreate the views
[] s3
** [] codfw
** [] eqiad
** [] Run maintain-views on labs hosts to recreate the views
[] s4
** [] codfw
** [] eqiad
** [] Run maintain-views on labs hosts to recreate the views
[x] s5
** [x] codfw
** [x] eqiad T233135#5655648
** [x] Run maintain-views on labs hosts to recreate the views
[x] s6
** [x] codfw T233135#5502104
** [x] eqiad T233135#5502104
** [x] Run maintain-views on labs hosts to recreate the views
[x] s7
** [x] codfw
** [x] eqiad progress T233135#5571998
** [x] Run maintain-views on labs hosts to recreate the views
[x] s8
** [x] codfw
** [x] eqiad T233135#5671879
** [x] Run maintain-views on labs hosts to recreate the views
[x] labswiki
[x] labtestwiki
[] Remove columns from `modules/role/files/mariadb/filtered_tables.txt` once everything is done.