rails/rails — pull request #17515 by prathamesh-sonpatki (2014-11-05 06:33:48+00:00)
Title: Removed the unused require of proxy_object

- Reference : https://github.com/rails/rails/pull/17493#issuecomment-61739359
- Duration stopped inheriting from ProxyObject in https://github.com/rails/rails/pull/16574