I finally got my letter. It is indeed very threatening as expected. It says I'm in violation and need to appear before a magistrate. This would be quite scary if I didn't already have confirmation that the case is closed and the hearing is canceled.
For some reason they sent me two copies. Fun. I'm going to throw one copy in the trash as hard as I can without the paper going *fwap* and flying all over the place. I'm thinking I'll get the other copy framed as a trophy. I knew this was going to be resolved before the hearing, but to have it resolved before they could manage to mail the letter is priceless.