Is there anyway to remove one of the payment icons on the footer? On a different thread, I saw the payment icon code was in the Templates > Responsive > CSS > Styles.less. However, I was not able to find it. Which line of code is it on?
It depends on the theme you use. Default file with payment icons can be found here
It has hook which allows to change content of this block.
As for default with styles, it is located here
But it is strongly recommended to add custom styles to the CSS section of the Theme editor