To fully understand how our Banner Ad Design Manager works make sure to read this article: (Bootstrap) Banner Manager / Banner Ad Design - New Design Setting
Important: The Google Ads Banners you might see is an example of how you may use your banners, see how you can monetize your own Banners with Google.
In order to disable a banner, you first need to identify the banner, for example, this one is located close to the footer, this one is the: Footer Banner Ad
Now you will need to go to:
SETTINGS >> DESIGN SETTINGS > Banner Ad Design
On the drop down options, select Disable Banner Ad:
Lastly, click on Save Changes.