I can see where to add new folders to the Media Library through the Setup, but how/where do you delete a Folder?

I originally had all my music files on another networked computer but have since moved them to the one with Mezzmo on it. From perusing the db file with SQLite browser (because of the growing size as mentioned in another post) I can see that part of my issue is that it still has records for some 16,000+ files that I no longer need referenced as they are now in a new location.