I had one discrete question about it.. which ended up being fairly easy. But there's really not a whole lot to know about bones anyways. So learn it just incase.
what do you mean by bones? like the anatomy of bones? well thats not on it, there's not much anatomy on the MCAT to begin with any way. However, if you are talking about concepts such as bone remodelling (i.e. osteoblats and osteclasts) well I would imagine that is still on it.
That might pop up in the passage but you won't be required to know it. I mean that is more anatomical you know? I don't think I have ever seen a question that required you to know about Haverian Canals w/o giving it away in the passage?
You don't need to know anatomy, as in the locations of the bones in the body. However, I think you do need to know those things regarding canaliculi and haversian canals, etc.
Also, stuff like the diaphysis (contains marrow for lymphs, white blood cells, and also contains adipose), epiphysis (red marrow, and site of red blood cell production), epiphyseal plate (site of growth)