clean up useless code

config/environment.rb

@@ -29,7 +29,7 @@ Rails::Initializer.run do |config|
 
   # Skip frameworks you're not going to use. To use Rails without a database,
   # you must remove the Active Record framework.
-  # config.frameworks -= [ :active_record, :active_resource, :action_mailer ]
+  config.frameworks -= [ :active_record ]
 
   # Activate observers that should always be running
   # config.active_record.observers = :cacher, :garbage_collector, :forum_observer