Roger That... Exactly... A Ball Peen Hammer and the Right Size Cold Chisel will do the trick. Fixing the Bracket in a Vise would not hurt for controlling the thing while you Fram on them to get 'em out... and then head right back to the Bench so you don't have to Beat the Rims and Edges in place with a 19mm Socket sideways with the Bracket held in the Vise.
Mind that the Silicone Rubber Boot segments don't accidentally get wedged in between the Bottom of the Socket and the Outer Flange Edge of the Bracket... they ARE Slippery Devils and WILL try to poke their way out while you work on them.