•In the Browser, go to the "Stack" category.
•Select the stack to delete.
•Either do a right click on it, the « delete » function is displayed, or click on the "trash can" icon 
available at the right side of the Browser.
A message to confirm the deletion is displayed. Click on « Yes» to confirm the deletion or « no » to cancel the action.
Attention : it is not possible to delete a stack with the RTB validation (you must remove the validation first).