If the allen head is rounded just hammer a 5.5mm Allen key into it and unscrew it. However if this doesnt work first try, drill the head a bit so that the hole is deeper, then hammer the 5.5 allen key in there.
I got it out and sold it to Evand777 but thanks for the help guys. I ended up drilled out the head but then the fork still didn't come out because the bars were so tightly compressed so i put wd-40 on the slit in pulled hard.