Remove utf8_enforcer_param config option

actionpack/lib/action_view/railtie.rb

@@ -8,13 +8,6 @@ module ActionView
     config.action_view.stylesheet_expansions = {}
     config.action_view.javascript_expansions = { :defaults => %w(jquery jquery_ujs) }
 
-    initializer "action_view.utf8_enforcer_param" do |app|
-      ActiveSupport.on_load(:action_view) do
-        param = app.config.action_view.delete(:utf8_enforcer_param)
-        ActionView::Helpers::FormTagHelper.utf8_enforcer_param = param
-      end
-    end
-
     initializer "action_view.cache_asset_ids" do |app|
       unless app.config.cache_classes
         ActiveSupport.on_load(:action_view) do

railties/guides/source/configuring.textile

@@ -330,8 +330,6 @@ And can reference in the view with the following code:
 <%= stylesheet_link_tag :special %>
 </ruby>
 
-* +config.action_view.utf8_enforcer_param+ tells Rails what the +name+ attribute should be for the hidden tag that's used for enforcing UTF8 encoding in form submissions. The default is +'utf8'+.
-
 * +config.action_view.cache_asset_ids+ With the cache enabled, the asset tag helper methods will make fewer expensive file system calls (the default implementation checks the file system timestamp). However this prevents you from modifying any asset files while the server is running.
 
 h4. Configuring Action Mailer

railties/test/application/configuration_test.rb

@@ -250,21 +250,6 @@ module ApplicationTests
       assert last_response.body =~ /_xsrf_token_here/
     end
 
-    test "utf8 enforcer param can be changed" do
-      make_basic_app do
-        app.config.action_view.utf8_enforcer_param = "_unicode"
-      end
-
-      class ::OmgController < ActionController::Base
-        def index
-          render :inline => "<%= form_tag('/') %>"
-        end
-      end
-
-      get "/"
-      assert last_response.body =~ /_unicode/
-    end
-
     test "config.action_controller.perform_caching = true" do
       make_basic_app do |app|
         app.config.action_controller.perform_caching = true