Deleting A Business Process 
You can delete a business process. However, if the business process is assigned to a function, risk, or rule, then you cannot delete the business process until you have removed the business process assignment from all objects.
Note
For the business process you wish to delete, remove the business process from its objects; and, then assign a different business process to each object.
End of the note.
Procedure
To delete a business process:
Follow the procedure Viewing a Business Process to find the business process you want to delete.
Once you find the business process, choose the
checkbox 
Delete 
.A dialog appears, requiring you to confirm the deletion.
Choose OK.
Result
Risk Analysis and Remediation deletes the business process.