Go to the list of training sessions. You can delete a training session by clicking on the dropdown button in front of the session and choose Delete in the menu.
NOTE: Training sessions can not be deleted when users are subscribed for that session, you must first delete the users from the subscribed list.
NOTE: Training sessions that are deleted, are still in BizzMine. You can find them in the trashcan (you find the trashcan in the list of training sessions) and restore them from there.