Years ago we tried out CiviHR and it added something which looks like a set of custom fields, called "Extended Demographics". We uninstalled the extension but this did not go away. I can't find anywhere in Civi settings how to disable or remove it. I've ignored it till now but we are about to give a lot more people access to Civi and it will confuse people having irrelevant (and very personal!) fiends on there.
I suspect it was a bug in CiviHR that caused it to be left behind. If I want to remove it from the database using MySQL (which I am very familiar with) then is there anything I need to know so I don't break anything? We have backups, but the less blindly I can bash at the live site the better.
Obvs if there is a setting I've missed that would be much better