I would have to check, but I think that one is a roll pin. You will probably need the proper size of punch to get that out.
You might be able to rig up something by taking a nail or piece of metal coat hanger and turning it down on a grinder till you get the right diameter. It's ghetto, but I think it could work. Of course, that assumes you have access to a grinder, or at least a dremel.
I may just have to take out the bolt and take it to home depot and ask "i need to get THIS thingy out" and see what he says. I need to stop there anyway