Remove sidebar from cart and checkout page in Genesis WooCommerce

// =========================================================================
//REMOVE SIDEBAR OF GENESIS CHECKOUT AND CART PAGE 
// =========================================================================
function remove_checkout_sidebar_genesis($opt) {
    if( is_checkout() || is_cart()) {
       $opt = 'full-width-content';
        return $opt;
    }
}
add_filter('genesis_site_layout', 'remove_checkout_sidebar_genesis');