Deletes a registered callback that isn't used by any subscriptions. Delete all subscriptions for the callback before deleting the callback.
|callbackId||string||Required||Unique identifier of the callback.|
|200 Success||Callback is deleted.|
|403 Forbidden||Failed to pass authorization.|
|404 Not Found||Callback ID doesn’t exist.|
|409 Conflict||Subscriptions exist for the callback. Delete all subscriptions for the callback before deleting the callback.|
|500 Server Error||Internal error|