Remove/Hid main menu on Frontpage

I looked around but cannot find an answer for this. I'm doing a frontpage which is very "clean" and simplified, and all the content will be on subsequent pages.

So...I don't want the menu appearing on the frontpage, which is easy to do in the module manager....only this menu doesn't seem to be controlled by any module there.

So how to do it? Any feedback on this would be most appreciated. Cheers!

Nick