I clip beaks and sharp toenails/claws from fowl that I feed, as they have been known to scratch up the inside of a snake badly enough to get infected and eventually kill the animal.
Otherwise if I remove parts of a f/t feeder it's because I need that part for a specific purpose, such as feeding a tail to a snake that will take it as a "worm", or a hind leg from a jumbo mouse as an assist-fed meal for a non-feeding small snake.