Clean the WP Dashboard

wp_clean_dash

// Clean the dashboard.
function pk_clean_dashboard() {
    global $wp_meta_boxes;
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_recent_drafts']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['bbp-dashboard-right-now']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['yoast_db_widget']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['rg_forms_dashboard']);
}
add_action('wp_dashboard_setup', 'pk_clean_dashboard', 999);