Delete a variable in a self-service flow if you do not need it. You cannot delete a variable in use in a self-service flow.
Procedure
In the Self-service Flows view, locate the required self-service flow and click .
Click the Flow creator tab.
At the top of the canvas, click Variables.
Locate the required variable and click .
If you try to delete a variable in use, Automation shows a message saying: The variable Variable Name cannot be removed because it is being used, please verify. The tasks that use the variable appear in a list after the message.