Deleting a Question Group
                                                    If a question group is no longer needed you can permanently remove it from your application. Deleting a group will also delete any questions and associated content inside the group.
You will need to check a question group out using Source Control before you can delete it.
Implementation:
- Switch to the Definition tab.
 - Right-click the intended question group.
 - Click Delete.
 
Alternatively click the Delete key on your keyboard to remove the intended question group from your model.
- Confirm the action when prompted.