Remove all earlier iterations of Orc object APIs

[arthurp]

Orc has collected a number of object APIs (a couple of them are my fault). We should clean that up. The APIs are currently marked as @depricated so it should be easy to find their uses.

The APIs are:

• orc.values.HasMembers
• Verify that no remaining sites expect to be called with a Field value. The compiler cannot help with this sadly.

All users of these APIs should be converted to implement orc.values.sites.AccessorValue.