clean code

lib/views/layout/layout.html

@@ -212,19 +212,6 @@ gh/highlightjs/cdn-release@9.12.0/build/languages/yaml.min.js
   </div><!-- /#page-wrapper -->
 
 </div><!-- /#wrapper -->
-<!-- Bootstrap Core JavaScript -->
-<!-- <script src="bootstrap/dist/js/bootstrap.min.js"></script> -->
-<!-- Menu Plugin JavaScript -->
-<!-- <script src="../plugins/bower_components/sidebar-nav/dist/sidebar-nav.min.js"></script> -->
-<!--slimscroll JavaScript -->
-<!-- <script src="js/jquery.slimscroll.js"></script> -->
-<!--Wave Effects -->
-<!-- <script src="js/waves.js"></script> -->
-<!-- Custom Theme JavaScript -->
-<!-- <script src="js/custom.min.js"></script> -->
-<!--Style Switcher -->
-<!-- <script src="../plugins/bower_components/styleswitcher/jQuery.style.switcher.js"></script> -->
-
 
 {% block layout_head_nav %}
 <nav class="crowi-header navbar navbar-default" role="navigation">