Menu Icons Do Not Remove

I installed Menu Icons and i must say its pretty cool with all of its awesomeness. I used it on both my header menu navigations and sidebar for my Previous theme

However when i switched to a new theme, i only want to be using it for the sidebar navigation and not the header

So, the thing is am finding it hard to remove the icons from the header menu

The page I need help with: [log in to see the link]