jef3000 on "Remove custom taxonomy from database"

I have some custom taxonomy created, but would now like to completely (also from the database) remove the taxonomy. Does anyone know a proper way to handle this or knows a query to clean the database?

Example code:

register_taxonomy(
		'xbox360',
		array('post', 'con_game_reviews', 'con_game_previews', 'games'),
		array(
			'hierarchical' => false,
			'label' => 'games - Xbox 360',
			'query_var' => true,
			'rewrite' => array('slug' => 'xbox360')
		)
	);