[Class hierarchy] terminally differentiated cells

[noamrotenberg]

CL term
non-terminally differentiated cell (CL:0000055) and terminally differentiated osteoblast (CL:0001039)

Suggested revision of class hierarchy
Currently, "non-terminally differentiated cell" (CL:0000055) is an ancestor of "terminally differentiated osteoblast" (CL:0001039), which seems incorrect to me.
I think the issue is osteoblast (CL:0000062) isa Subclass of "non-terminally differentiated cell", even though there is a "non-terminally differentiated osteoblast" child of osteoblast. I'm not sure whether these 2 children of "osteoblast" should be deleted or the connection between "osteoblast" and "non-terminally differentiated cell" should be deleted.