Remove unnecessary namespaces, attempt to fix Baeckerajax.php

src/Praktikum/Prak5/baeckerAjax/Baecker.js

 function loadData() {
     "use strict";
-    var url = "./Kundenstatus.php";
+    var url = "../Kundenstatus.php";
     var request = new XMLHttpRequest();
 
     request.open("GET", url, true);

src/Praktikum/Prak5/baeckerAjax/Baeckerajax.php

@@ -16,10 +16,6 @@
  */
 
 // to do: change name 'baecker' throughout this file
-namespace baeckerAjax;
-use OrderedArticle;
-use Page;
-
 require_once '../Page.php';
 require_once '../DB_Classes/OrderedArticle.php';
 require_once '../navbar.php';