I'm not sure how to do that. What box?
In Site Administration->Users->Permissions->User Policies there is an entry "Creator's role in new courses." This is a drop down menu without "none" as an option.
I may be looking in the wrong place. Is there another place where this is addressed?
I have to admit that I've never been a "Course Creator" -- as the site administrator perhaps I see a different dialog when I create a course.