Remove various cultural sensitivity badges

Since April 1st, this commit has been part of OARS: https://github.com/hughsie/oars/commit/bbb10186cbecb49252610e5604ed025df8f4c8b7

It removes the following entries:

violence-worship
sex-homsexuality
sex-prostitution
sex-adultery
sex-appearance

My understanding is that we should remove them from GNOME Software as well, following the OARS change.