How do I remove this section from displaying?

[strongarm_playa]

I closed off the forum from New Threads, But I want to know how to remove the section at the bottom where it says "Title: There are no threads to display."
All my threads in this particular section are already organized. So I do not need no strang-along threads to be posted. But since I closed it from "New Threads", how do I remove this section? JUST FROM THE FORUMS I CLOSED OFF. Not every forum/section.

 

[Andrej]

You need to make a category instead with the sub forums under.

Category 1
---> Category 2
-------> Sub forums

 

[CFodder]

For each forum there is an option to display in the node tree, just unselect that for the ones you don't want displayed. That what you were after?