Which option sets the widget design to not display an icon?

The choice indicating the option that sets the widget design to not display an icon is Simple. This design option is focused on a streamlined and uncluttered appearance, which often includes removing icons that might otherwise be included in other designs. The Simple design option prioritizes straightforward functionality and ease of use, which makes it particularly suitable for situations where visual distractions should be minimized.

In contrast, the other design options typically include icons as part of their layout. Minimal designs might pare down other features as well, but they can still include icons depending on the overall layout and theme. Standard designs usually contain both text and icons to enhance visualization and interactivity. Custom designs can vary widely based on user preferences but often involve a combination of elements that may include icons. Therefore, the Simple design specifically aligns with the request to avoid the use of icons, making it the correct choice in this context.