Remove deprecated `Rails::Rack::LogTailer`

railties/CHANGELOG.md

+*   Remove deprecated `Rails::Rack::LogTailer`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `RAILS_CACHE` constant.
 
     *Rafael Mendonça França*

railties/lib/rails/rack.rb

@@ -2,6 +2,5 @@ module Rails
   module Rack
     autoload :Debugger,      "rails/rack/debugger"   if RUBY_VERSION < '2.0.0'
     autoload :Logger,        "rails/rack/logger"
-    autoload :LogTailer,     "rails/rack/log_tailer"
   end
 end

railties/lib/rails/rack/log_tailer.rb

-require 'active_support/deprecation'
-
-module Rails
-  module Rack
-    class LogTailer
-      def initialize(app, log = nil)
-        ActiveSupport::Deprecation.warn('LogTailer is deprecated and will be removed on Rails 5.')
-
-        @app = app
-
-        path = Pathname.new(log || "#{::File.expand_path(Rails.root)}/log/#{Rails.env}.log").cleanpath
-
-        @cursor = @file = nil
-        if ::File.exist?(path)
-          @cursor = ::File.size(path)
-          @file = ::File.open(path, 'r')
-        end
-      end
-
-      def call(env)
-        response = @app.call(env)
-        tail!
-        response
-      end
-
-      def tail!
-        return unless @cursor
-        @file.seek @cursor
-
-        unless @file.eof?
-          contents = @file.read
-          @cursor = @file.tell
-          $stdout.print contents
-        end
-      end
-    end
-  end
-end