wordpress remove widget from dashboard

remove_widget.php

//HIDING UNWANTED WORDPRESS DASHBOARD WIDGETS
add_action('wp_dashboard_setup', 'wpc_dashboard_widgets');

function wpc_dashboard_widgets() {

    global $wp_meta_boxes;
    // Today widget
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);
    // Last comments
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);
    // Incoming links
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
    // Plugins
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);

}