I used a reciprocating saw and a compact circular saw with 4 1/2 " blade to cut the fiberglass shower stall into small pieces. It's easy to take it out.
DELTA Pivotal Toilet Paper Holder With Shelf, Polished Chrome, Bathroom Accessories, 79956 6.93 x 3.94 x 3.5 Inches
All old shower walls were gone. But I had to displace the plumbing vent pipe. I didn't expect that the pipe was there. There was more work. I had to open the ceiling of the second floor, and to work in the attic. It was very hot.