in modern html5 there is no need to wrap the script in a immediately invoked funcion expression

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

www/index.html

@@ -110,19 +110,6 @@
                 </p>
             </div>
         </div>
-
-        <script>
-            (function() {
-                var cx = '008742922050479854700:9nnmuh99is4';
-
-                var gcse = document.createElement('script');
-                gcse.type = 'text/javascript';
-                gcse.async = true;
-                gcse.src = 'https://cse.google.com/cse.js?cx=' + cx;
-
-                var s = document.getElementsByTagName('script')[0];
-                s.parentNode.insertBefore(gcse, s);
-            })();
-        </script>
+        <script type="text/javascript" async="" src="https://cse.google.com/cse.js?cx=008742922050479854700:9nnmuh99is4"></script>
     </body>
 </html>