[Theme: Utility] Deleting unwanted boxes on page

Hello.

Utility comes with several widget-like boxes along the right side that I’d like to eliminate. These include Default Images and Recent Posts. I looked at the code for Template and other sections, and can’t determine which code applies to these areas. Is it easy to eliminate them?

You can see which ones by going to https://tomfuszard.com.

I’d like to delete the top two boxes and three of the Recent Posts boxes down below. However, I want to make sure that the widgets move up to fill the void. Would they? Thanks!

Tom