rails/rails — pull request #5674 by avakhov (2012-03-30 20:55:35+00:00)
Title: Remove obsolete reader from AC::MethodNotAllowed exception class

The MethodNotAllowed exception class was designed with member `@allowed_methods`
[01a4bc8#L0R18](https://github.com/rails/rails/commit/01a4bc84b8787df74d54147a0cf564df75e87970#L0R18) (3 years ago)

and refactored at
[588225f#L0L18](https://github.com/rails/rails/commit/588225f8852c4b60bfba38f16d8797a41e175400#L0L18) (2 years ago)

`attr_reader :allowed_methods` is not used now.