chore(dao): bit of cleanup

lib/associations/mixin.js

@@ -248,10 +248,4 @@ Mixin.getAssociationByAlias = function(alias) {
   }
 
   return null
-}
-
-/* example for instance methods:
-  Mixin.prototype.test = function() {
-    console.log('asd')
-  }
-*/
+}
\ No newline at end of file

lib/dao.js

@@ -50,8 +50,6 @@ module.exports = (function() {
     initValues.call(this, values, options);
   }
 
-  Utils._.extend(DAO.prototype, Mixin.prototype)
-
   /**
    * A reference to the sequelize instance
    * @see {Sequelize}