Unsubscribes the authenticated user from the specified list.
|list_id||required||The numerical id of the list.|
|slug||required||You can identify a list by its slug instead of its numerical id. If you decide to do so, note that you'll also have to specify the list owner using the owner_id or owner_screen_name parameters.|
|owner_screen_name||optional||The screen name of the user who owns the list being requested by a slug .|
|owner_id||optional||The user ID of the user who owns the list being requested by a slug .|