thank you for posting into our forum. Since only the impacted listing has been removed, I would advise you to simply wait for the violation to disappear from your metrics after 180 days.
Amazon will often remove a listing even though only one seller engaged in prohibited activities. So, if you haven’t done anything wrong, I would advise you to rather not poke the sleeping bear and move on.
I hope this helps. Please feel free to post here whenever you need help.