The EDD products adds a body class of ‘single-download’ to the page HTML, so you could hide the sidebar on your digital products with this Additional CSS in the customizer:
.single-download #primary {
width: 100%;
}
.single-download #secondary {
display: none;
}Please note this will hide the sidebar from view, and it will still exist in the HTML markup of your product pages but it will be hidden from view.
If you want to remove the sidebar completely from the product pages, it could be done with a plugin such as Widget Options to set the sidebar widgets to not be displayed on posts that are of the ‘download’ post_type.