Deleting a Rule Set 
You can delete a rule set. However, if the rule set is assigned to a rule set, risk, or rule, you cannot delete the rule set. Before you can delete the process, you must remove the rule set assignment from all risks by assigning a different rule set to each risk.
To delete a rule set:
Follow the procedure in the Viewing a Rule Set topic to search for the rule set you want to delete.
Choose the check box next to the rule set to open it, and choose Delete.