How to Retire a Call Flow
Step 1: Open Call flow to be retired (in Edit Mode)
Step 2: Click on the icon with the double-arrow next to the call flow name... it will expand the Details section
Step 3: Set the Status to 'Retired' (available only when call flow is not mapped to any campaign)
Step 4: Click Update Details
TIP: If you need to identify all the Campaigns that are associated with the flow, click on the Log tab, and locate the Campaign drop-down list. This will show all the campaigns that are linked to the flow.