file you need to comment

controller_helpers.rb

module AbTests::ControllerHelpers

  # def randomize_ab_version
  #   Random.rand(2) == 0 ? "current" : "rtc"
  # end

  # def get_ab_version
  #   if params[:ab_version]
  #     cookies[:ab_version] = params[:ab_version]
  #   else
  #     cookies[:ab_version] ||= randomize_ab_version
  #   end
  # end

  # def redirect_to_ab_version!
  #   if get_ab_version == "rtc" and not request.host.include?(get_ab_version)
  #     redirect_to "http://#{get_ab_version}.#{request.host.gsub("www.","")+request.fullpath}"
  #   end
  # end

end