deleting databases

Rereading the tutorial for the first time in years I discovered the llovely command 

$ mtn db init --db=:beth

in section 2.3, which creates a database in a standard location, 
normally $HOME/.monotone/databases

I immediately tried it out, and created

~/.monotone/databases/onion.mtn

And, of course, I then wondered how to delete it again.


Now I get to ask -- does monotone keep any information on this 
database  outside of the database itself and the _MTN directories in 
its workspaces.

Because if not, I can delete it with a simple
	rm ~/.monotone/databases/onion.mtn
but if so, there will be some other bookkeeping to do.

-- hendrik