Do we still want Namespaces docs?

These Namespace docs don't seem like a good fit under the Release Process section of RTDs.

http://docs.opendaylight.org/en/latest/release-process/namespace.html

It's not clear to me that they are useful, that we still need them. If we don't need them, should remove. If we do need them, maybe at least remove link from Release Process main docs.