You can delete notification groups when they are no longer in use or required.
In the Notification Groups view, click the Delete button on for the same row of the notification group you would like want to delete.
Click the Delete button in the prompt You will be prompted to confirm that you would like want to delete the group, .Click Delete to confirm. The delete option permanently removes the notification group and removes all set notifications to the group from all streams.
You are returned
If everything went well, you will return to the Notification Groups groups view with a banner indicating the successful deletion of the notification group.
and see a message saying that the group was successfully deleted.