Tabs are autoloaded, don't need to explicitly require

lib/refinery/blog/engine.rb

@@ -9,10 +9,6 @@ module Refinery
       isolate_namespace Refinery
       engine_name :refinery_blog
 
-      config.to_prepare do
-        require 'refinery/blog/tabs'
-      end
-
       initializer "register refinerycms_blog plugin", :after => :set_routes_reloader do |app|
         Refinery::Plugin.register do |plugin|
           plugin.pathname = root