Destroy a database.

def destroy():
    """Destroy a database."""
    if not os.path.exists(ARGS.database):
        exit('Error: The database does not exist; you must create it first.')
    if ARGS.force:
        os.remove(ARGS.database)
    elif raw_input('Destroy {0} [y/n]? '.format(ARGS.database)) in ('y', 'Y'):
        os.remove(ARGS.database)