Quote Originally Posted by Gripstir View Post
I know it wasn’t completely erased after being a Horseman. It was brought out of him again later on when he went into the Underworld for a mission in a later comic book. I will have to recheck where it happened. So it is technically embedded in all horsemen just dormant. I don’t know if there was a specific event to remove it but if not then it is still dormant inside him

Edit: it was in a mini series called X-men Hellbound. Where they go to limbo looking for Magik
At a meta level, I'm sure it's the kind of thing where a writer could bring it back fairly easily if they wanted (or if anyone ever decides to write Gambit again, for that matter, lol)