The Nike logo is meant to be permanent, so it's not easy to remove it. The best way is to get a brand-new pair of shoes, but if you want to remove it you can try. Apply paint thinner / acetone to remove it. You can also sand it off. Be careful, just use a light touch when sanding and don't press too hard or you might damage the shoe. You can also try using common rubbing alcohol to take it off. With a single drop, rub the logo by joining the letters, the graphic may go with it.