Use a punch and hammer - it should come right out. Harbor Freight has cheap punch sets if you don't have the right size. Not a bad idea to replace the roll pin anyway though - order from your local dealer.
Another thing you might run into - I could not for the life of me get the bolt to go into the new plastic bushing, even greased up. Even broke a couple of them trying to hammer the thing in. I had to use a bit just a tiny bit larger than the bushing's inner diameter and drill it out ever so slightly. Worked like a charm.