Remove W3TC update notice

remove-w3tc-update-notice.php

<?php
add_action('admin_init', function() {
    global $wp_filter;
    foreach ($wp_filter['admin_notices'] as $admin_notices) {
        foreach ($admin_notices as $key => $admin_notice) {
            if (preg_match('/[\w\d]+notify_edge_mode$/', $key)) {
                remove_action('admin_notices', $key);
            }
        }
    }
});