What do you mean by "see the table/Entity"? The listing of the entity in the root URL of the server? If yes, then currently it's not possible to remove it from that list.
It doesn't affect the server anyway, since users will not be able to access it through the regular entity endpoints.
Ex: I have a TPerson Aurelius Entity I don't want exposed. OTOH, I need to expose a services operation (IPersonContract/TPersonService) in /Person /Person/{Id} -- now possible with XData 4.5
So, I would need to be able to exclude TPerson from XData endpoint and have /Person path used by IPersonContract (where TPersonService implementation would internally use TPerson)