It all depends on how it shoots whether or not I would mess with it and how bad the twist is.
If the twist isn't super bad and the bow shoots fine like it is, then I wouldn't mess with it.
But if the string is way off to one side and it doesn't shoot consistently well, then I would try to get some of it out before I trashed it.
I've got a flatbow I made out of Osage and the stave I used was absolutely hideous. I made it into a flatbow just to prove that I could. I took out about as much twist and canter from the entire length of the bow as I was really comfortable with. The thing is that is very accurate and doesn't seem to affect the way it shoots, so it is what it is. I went ahead and finished it and it's still shooting great and a load of fun to shoot. It's the most simple bow a guy could have and that's what I love about it.
I might make a few more in the future because I've had some guys ask me for one exactly like it.