How do you undo a delegation made with the delegation of control wizard at an OU

I went through the wizard at a low level OU, for experimental sake, added a single harmless right (read user info) to a generic security group (which contains only a very few people who are already domain admins), and then hit finished.  

I have since been unable to figure out how to undo that action?  I KNOW this was a harmless thing and it can be left as it is, without harm.  However, if this was a bad mistake, or some other crazy reason I wanted to, how could I undo it.