I have no food allergies or dietary restrictions. Generally, I eat anything that doesn't run away from me.
That said, I don't care to eat, and would politely refrain from eating if offered: liver, brussel sprouts, and.....well....I think that's about it.
I'm not counting the really bizarre in there: crickets, worms, monkey brains, fried cicadas, suff like that. (A neighbor sauteed some newly hatched cicadas with garlic and butter when the 17-years hatched a few years ago, and claimed they were quite good. I'll take her word for it. I imagine anything is good cooked with butter and garlic, but I have my limits.)