You want to remove the quantity field from your products.
If you add the code below in the functions.php file of your theme, this option will no longer be in view.


function wc_remove_all_quantity_fields( $return, $product ) {
return true;
}
add_filter( 'woocommerce_is_sold_individually', 'wc_remove_all_quantity_fields', 10, 2);