You could use pretty much anything to take it off actually. Those lenses can’t be scraped by something steel so I would just use a pocket knife and just kinda stab into it at an angle and lift up. That should pull the entire “protector” without scraping the camera.
Apple has been making camera lenses pretty durable for a while now. You should be all good to grab a knife and peel it off, but you can also feel free to just try to pick at it with a plastic guitar pick or something similar.