They should have easily removed it if asked. A number of years ago, during a Labor Day sale, I decided to buy a new car they had there. It already had the dealer sticker on it. I asked for it to be removed and they removed it when they prepped the car.
Try not to use your engineering skills when sounding this one out, just read it! Ol'Dad in da MiddleofdaMitten!
Since I live in NC which does not require a front license plate, on the front I use my "old time" California (Oakland Raiders) plate which represents my home city and state, as well as my team. I did a personalize Ag Prime, which simply means Silver Prime. (They wouldn't let me use a small g like to Atomic symbol.)