Change to always returns html document in error pages (#12214)

app/controllers/application_controller.rb

@@ -136,9 +136,6 @@ class ApplicationController < ActionController::Base
   end
 
   def respond_with_error(code)
-    respond_to do |format|
+    render "errors/#{code}", layout: 'error', status: code
-      format.any  { head code }
-      format.html { render "errors/#{code}", layout: 'error', status: code }
-    end
   end
 end

spec/controllers/application_controller_spec.rb

@@ -22,11 +22,6 @@ describe ApplicationController, type: :controller do
   end
 
   shared_examples 'respond_with_error' do |code|
-    it "returns http #{code} for any" do
-      subject
-      expect(response).to have_http_status(code)
-    end
-
     it "returns http #{code} for http" do
       subject
       expect(response).to have_http_status(code)