Fix avisos

import/html_header.php

@@ -14,10 +14,6 @@ if (!isset($_SESSION['user'])) {
 }
 
 $user = unserialize($_SESSION['user']);
-if ($user->admin):
-    ?><!-- <pre><? var_dump($user) ?></pre> -->
-<?
-endif;
 $grupos = $user->admin ? queryAll("SELECT * FROM GRUPO ORDER BY grupo_nombre") : $db->query("SELECT * FROM GRUPO WHERE grupo_id IN (SELECT grupo_id FROM PERMISO_VIEW WHERE id = :id) ORDER BY grupo_nombre", array(":id" => $user->user['id']));
 
 function html_header($title, $header = null)