Actually, for a restaurant floor, it looks pretty clean. And...for the record, there are many of those strips that are laying 'on top' of other strips and have yet to touch the floor. IMHO...THOSE are safe to eat.
Personally, as long as no one has stepped on them, I would pick em all up, wash em off and reheat. HOWEVER, I WOULD NOT serve them to anyone else. They would be my secret stash.
This post created with 100% recycled electrons.
Take Care...and, Stay Safe!