Sorting Options

Hey,
can you help me with my sorting options. I build a affiliate store with woocommerce and wzone. i want to remove the “sort by sales rank” option in the sorting options.
i tried with:

// Edit WooCommerce dropdown menu item of shop page//
// Options: menu_order, popularity, rating, date, price, price-desc

function rsd_catalog_orderby( $orderby ) {
unset($orderby[“sales_rank”]);
return $orderby;
}
add_filter( “woocommerce_catalog_orderby”, “rsd_catalog_orderby”, 20 );

but it dont work. When i insert price, popularity, etc… it works.

And is it possible to change the sort by popularity option ? I would like to change it to the product page views.

The page I need help with: [log in to see the link]