Remove the lactose intolerance trait from cottage living

I really don't see why people are making such a big deal out of it. Obviously it's not a personality, but they're not gonna make a separate allergies panel in CAS for one single intolerance so it makes most sense to add it to the traits section. It just adds more depth and realism to sims which is always good. It would be nice if we could have more traits though so you can add these sorts of things without it taking up too much trait space