No, Dropshock apparently had a problem with GIRP. If anyone wants it back, it'll be back.
Why would you think such a thing? The game is fine. It's fun, actually. It just isn't challenging or "nearly impossible" as you might think it is. It might just be my opinion, but I don't think it fits into this thread. Or I'm just misunderstanding what you mean by "Retro", because GIRP isn't retro at all.