This must be staring me in the face, but don't see the command. How do I delete an unused Firebase DB from the Console in the new Firebase? And Google did not help with an answer, which is kind of a first.
THIS DELETES THE ENTIRE PROJECT
To delete ONLY the database just delete the top level object/node.
Click on your project (the white box below, hiding name):
Then click on gear (settings) icon and click "Project Settings":
Scroll to bottom and click "DELETE PROJECT":