Removing an unecessary code line

app/controllers/articles.js

@@ -11,8 +11,6 @@ var mongoose = require('mongoose'),
  * Find article by id
  */
 exports.article = function(req, res, next, id) {
-    var User = mongoose.model('User');
-
     Article.load(id, function(err, article) {
         if (err) return next(err);
         if (!article) return next(new Error('Failed to load article ' + id));
@@ -82,4 +80,4 @@ exports.all = function(req, res) {
             res.jsonp(articles);
         }
     });
-};
+};