jwsacco it is not welded in. I think it is just hard to get a good grip on it. Use a phillips head socket and a ratchet. Place the socket into the screwhead and use a small hammer to tap the bottom of the socket thus loosening the screw a bit. The use the ratchet on the socket to remove the screw.
Check the first 45 sec off [https://www.youtube.com/watch?v=Vg6D5w27go4|this video]