How Do I Uninstall Classic?

I've got an iBook G4. I was running Tiger on it for a while, with Mac OS 9 installed to support the Classic environment, which I used occasionally. I just upgraded to Leopard, and now when I try to open Mac OS 9 apps, I get a message saying the Classic environment is no longer supported. This is understandable, and I was hardly using Classic anymore anyway. Now I'd like to uninstall Classic, to free up some disk space. I know I could just drag the Mac OS 9 system folder and applications folder to the trash, but I thought it might leave other files behind, such as the Classic preference pane and others, so I came here. How do I completely uninstall Classic?