Update index.html (Remove Terrain)

public/X3DOMTutorial/index.html

@@ -54,11 +54,11 @@
     <li><a class="button" href="treesdeciduous.html">trees deciduous</a></li>
     <li><a class="button" href="treesconifer.html">trees conifer</a></li>
     <li><a class="button" href="externalfile.html">external file</a></li>
-    <li><a class="button" href="terrain.html">terrain</a></li>
+    <!-- <li><a class="button" href="terrain.html">terrain</a></li> -->
     <li><a class="button" href="barchart.html">barchart</a></li>
     <li><a class="button" href="toytown.html">toy town</a></li>
     <li><a class="button" href="addnode.html">add node</a></li>
   </ul>
 </body>
 
-</html>
\ No newline at end of file
+</html>