Removing 1 of 2 Exchange 2016 servers

I currently have 2 Exchange 2016 servers.  One was meant to be temporary and one a production.  I no longer wish to have the temporary one and need to remove it, while keeping the production.  Here are some specs:

We are in a hybrid mode
No mailboxes are on the temp one (except for arbitrary mailboxes)
Send connectors reference the temp (along with the production)
We do have on-prem mailboxes.

So far I think I need to migrate the arbitrary mailboxes to the new server
Delete the reference to the temp send connectors
Uninstall from control panel

Am I missing something or anything else that would cause a nightmare?  Please let me know.