if you don't want to cut/weld, just slice it vertically to the frame every few inches and then hammer this shit out of with the biggest sledge you can find. that said, i don't see why cutting and welding would be bad. you wouldn't be losing anything structurally compared to my slice/flatten method.
after you beat/cut/weld/whatever that inner seam, the next one you'll hit would be the outer one. this one is easy enough to hammer up and out:
^ but real talk, the best fix for all this shit is to get shorter front tires! haha
