From 51f1d5a960e250905252b8646ff9563436309b86 Mon Sep 17 00:00:00 2001
From: "yuuji.yaginuma" <yuuji.yaginuma@gmail.com>
Date: Thu, 27 Oct 2016 08:28:14 +0900
Subject: remove unused `RedirectBackError` class

Follow up to 333bfd896e87862cece95deb1ef88132d5f54ba8
---
 actionpack/lib/action_controller/metal/redirecting.rb | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/actionpack/lib/action_controller/metal/redirecting.rb b/actionpack/lib/action_controller/metal/redirecting.rb
index 2b060e3698..30798c1d99 100644
--- a/actionpack/lib/action_controller/metal/redirecting.rb
+++ b/actionpack/lib/action_controller/metal/redirecting.rb
@@ -1,12 +1,4 @@
 module ActionController
-  class RedirectBackError < AbstractController::Error #:nodoc:
-    DEFAULT_MESSAGE = 'No HTTP_REFERER was set in the request to this action, so redirect_to :back could not be called successfully. If this is a test, make sure to specify request.env["HTTP_REFERER"].'
-
-    def initialize(message = nil)
-      super(message || DEFAULT_MESSAGE)
-    end
-  end
-
   module Redirecting
     extend ActiveSupport::Concern
 
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