Delete Record/RequestPerform without dialog prevents the deletion confirmation dialog box from displaying when the script step executes.
Make sure that the record you want to delete is active (use navigation script steps), and then use Delete Record/Request. If the current layout contains a portal, click anywhere on the record outside of the portal to make sure that no related record is selected, then use Delete Record/Request. Make sure that the find request you want to delete is active (use navigation script steps), and then use Delete Record/Request.