# File mod_docs/erb.rb, line 33
  def filter_open(context, script_name, request, response, logger)
    request.delete_header('If-Match')
    request.delete_header('If-None-Match')
    request.delete_header('If-Modified-Since')
    request.delete_header('If-Unmodified-Since')
    request.delete_header('If-Range')
    nil
  end