Remove Add new post button from a custom post type

Does anyone know how i can remove the add new button on the edit page of a custom post type? I’ve followed various posts on how to achieve this but none seem to work, such as:

function hide_buttons() {
      global $pagenow;
      if(is_admin()){
        if( !current_user_can('publish_products') && ($current_screen->id == 'products' || $current_screen->id == 'edit-products')){
            echo "<style type=\"text/css\">.add-new-h2{display: none;}</style>";
        }
      }

    }
add_action('admin_head','hide_buttons');

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