Table deliverynotes is orphaned?

[TurboPT]

I've not yet been able to fully dig into when the deliverynotes table became orphaned, but there are no longer any code references to the table. I noted this table missing before the 4.15.2 release when pre-testing clean installs.

This repository search only finds references in the sql/mysql/ path, from when the table was first created back in v3.11, and other version updates since then, but nowhere else.

So, what should we do?

1. Restore the table and related references?
   
2. Add a drop table with the next release? (or make a release note so that users can do it themselves? ... so that we don't cause any data loss)
   
3. Something else???
   

Anyway, if anyone may already have some historical knowledge relative to this table, please add a comment, whether good or bad, so that we can determine the best resolve.