add_action('admin_init', function () {

    // Redirect any user trying to access comments page

    global $pagenow;

    

    if ($pagenow === 'edit-comments.php') {

        wp_safe_redirect(admin_url());

        exit;

    }

​

    // Remove comments metabox from dashboard

    remove_meta_box('dashboard_recent_comments', 'dashboard', 'normal');

​

    // Disable support for comments and trackbacks in post types

    foreach (get_post_types() as $post_type) {

        if (post_type_supports($post_type, 'comments')) {

            remove_post_type_support($post_type, 'comments');

            remove_post_type_support($post_type, 'trackbacks');

        }

    }

});

​