Hello Nadia,
There are no theme settings to remove it. It is only possible to hide the icons from the custom CSS code.
Add this custom CSS code X/Pro-->Theme option --->CSS
.x-pricing-column li.x-li-icon i {
display: none;
}
In case if you want to change the icons you can change it by changing the class name in the type attributes for example [cs_icon_list_item type=“circle”]First Feature[/cs_icon_list_item]
You can get the icons class name from here https://fontawesome.com/v4.7.0/icons/
The purpose of providing the custom CSS to show you how to add CSS code to your site. Writing custom CSS is outside the scope of our theme support. If you need more customization, you need to learn CSS and learn how to use the browser’s element inspector.
Hope it helps you.
Thanks