I have a connection with a set of possible values. What if one of those possible values is no longer possible and I would like to rid the set of that value? How do I?
I’m guessing that you are trying to remove options from a connected object that after no longer required or active?
In the connected object I’d add another multi choice or Yes/No field so you can then filter out retired or archived options. By setting a specific record to “archived” and adding a filter on the data source of the drop down it will only show “active” options.
I did a video and this subject a few years ago that might provide some help / inspiration 
I apologise if I’ve totally missed the point.
Archive, Restore and Soft Delete - Knack Database
Thanks for the response. This could work. I’m assuming then that once the connection field values are established, there isn’t a way to purge it. I ended up with these “test” values as a part of testing how to import connection field values into a pre-existing system I’m adding onto. It makes the list kind of unclean now.