does anyone no how to detrain a remote for a 1993 nc fairlane

With a hammer.

just a guess, do they work the same way as a ef/el one?

in that case, when you go to train a new one all the old remotes are unlearnt, and you have to redo them all?

so if its the same then im guessing you just put it into learn mode and just learn the ones you want. leaving the ones u dont want deleted from the system