Header Image

I am using the Di Multipurpose theme and when customizing, it looks close to how I want it to look, but after publishing, there is a header image that I have not enabled with this theme, so I don’t see a way to remove it. I’m guessing I will need to edit the code for this, but I haven’t been able to find it. Any help would be appreciated.

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