Remove default Metaboxes for first page Admin

Wp_Remove_Dashboard_Metaboxes.php

<?php
if (!defined("STEFU_LOADED")) {
    stopYou();
}

class Panel
{
    /*
     * prevent __construct
     */
    function __construct()
    {

    }
    /*
     * Remove default Metaboxes from front page Admin Panel
     */
    function uninstall_metaboxes()
    {
        add_action('admin_init', function () {
            remove_meta_box('dashboard_incoming_links', 'dashboard', 'normal');
            remove_meta_box('dashboard_plugins', 'dashboard', 'normal');
            remove_meta_box('dashboard_primary', 'dashboard', 'side');
            remove_meta_box('dashboard_secondary', 'dashboard', 'normal');
            remove_meta_box('dashboard_quick_press', 'dashboard', 'side');
            remove_meta_box('dashboard_recent_drafts', 'dashboard', 'side');
            remove_meta_box('dashboard_recent_comments', 'dashboard', 'normal');
            remove_meta_box('dashboard_right_now', 'dashboard', 'normal');
            remove_meta_box('dashboard_site_health', 'dashboard', 'normal');
            remove_meta_box('dashboard_activity', 'dashboard', 'normal'); //since 3.8
        });
        remove_action('welcome_panel', 'wp_welcome_panel');
    }
}