Can you remove a supercharger from motor?

You can, but if it is supercharged stock when you buy a car new (Audi A6 for example), it will do pretty poorly and since it's stock with the car, you wouldn't need to take it off, but if you buy a car with an aftermarket supercharger or you add one on and you want to take it off, you can with the same work you did putting it on.