Remove some unused JS.

source/javascripts/app/_lang.js

@@ -54,7 +54,6 @@ under the License.
   }
 
   function setupLanguages(l) {
-    var currentLanguage = l[0];
     var defaultLanguage = localStorage.getItem("language");
 
     languages = l;
@@ -81,7 +80,7 @@ under the License.
       activateLanguage(language);
       return false;
     });
-    window.onpopstate = function(event) {
+    window.onpopstate = function() {
       activateLanguage(window.location.search.substr(1));
     };
   });

source/javascripts/app/_search.js

 //= require ../lib/_lunr
 //= require ../lib/_jquery.highlight
-(function (global) {
+(function () {
   'use strict';
 
-  var $global = $(global);
-  var content, darkBox, searchResults;
+  var content, searchResults;
   var highlightOpts = { element: 'span', className: 'search-highlight' };
 
   var index = new lunr.Index();
@@ -31,7 +30,6 @@
 
   function bind() {
     content = $('.content');
-    darkBox = $('.dark-box');
     searchResults = $('.search-results');
 
     $('#input-search').on('keyup', search);
@@ -58,7 +56,7 @@
         highlight.call(this);
       } else {
         searchResults.html('<li></li>');
-	$('.search-results li').text('No Results Found for "' + this.value + '"');
+        $('.search-results li').text('No Results Found for "' + this.value + '"');
       }
     } else {
       unhighlight();
@@ -73,5 +71,4 @@
   function unhighlight() {
     content.unhighlight(highlightOpts);
   }
-
-})(window);
+})();