How do you heal a navel piercing you dont want anymore?

First of all, remove the jewelry. I'm sure you've already done that. Second, take care of the piercing as if there was still jewelry in it. Just because you took out the jewelry does not mean your risk for infection is gone. Keep cleaning it. There is nothing you can do to make healing time faster, that is all up to your body. Just make sure you keep taking care of it.