You can delete an entire call flow. When deleting a call flow, all actions to which the call flow is connected are deleted. All nodes including the nodes in the unused nodes branch will be deleted.
Note: Only Advanced users and System Administrators are able to delete a call flow.
To delete a call flow:
Select the call flow you want to delete.
From the Edit menu on the call flow page, click Delete Call Flow.
A confirmation window appears. Click Yes to confirm the deletion. All nodes including the nodes in the unused nodes branch will be deleted.