Because it violates the NYC’s ban on trans fat (even for emergency food):

When a small church comes to the Bowery Mission bearing fried chicken with trans fat, unwittingly breaking the law, they’re told “thank you.” Then workers quietly chuck the food, mission director Tom Bastile said.

Unbelievable! Why don’t they just tell the church not to make fried chicken because they can’t use it, why waste the food? And why can’t they just remove the skin?