Editor deprecation

Remove the protocol editor from the build and the code.
 * Check that the editor is no longer available from download
 * Check that the editor is no longer available from insight
 * Check that the editor is smart folders (protocol/experiments) are no longer available under attachments

Question: do we want to remove ns from DB?
We no longer have ref to protocol ns in code so probably not required. Having it db will allow people to still identify those files if they wish.