WordPress Bones theme remove admin widgets

admin.php

<?php

// disable default dashboard widgets
function disable_default_dashboard_widgets() {
    global $wp_meta_boxes;
    // unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);    // Right Now Widget
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_activity']);        // Activity Widget
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']); // Comments Widget
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);  // Incoming Links Widget
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);

    // unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);    // Quick Press Widget
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_recent_drafts']);     // Recent Drafts Widget
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);           //
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);       //
    // remove plugin dashboard boxes
    unset($wp_meta_boxes['dashboard']['normal']['core']['yoast_db_widget']);           // Yoast's SEO Plugin Widget
    unset($wp_meta_boxes['dashboard']['normal']['core']['rg_forms_dashboard']);        // Gravity Forms Plugin Widget
    unset($wp_meta_boxes['dashboard']['normal']['core']['bbp-dashboard-right-now']);   // bbPress Plugin Widget

}

add_action( 'wp_dashboard_setup', 'disable_default_dashboard_widgets' );