Remove obsoleted comment

packages/spiderable/spiderable_server.js

@@ -55,11 +55,6 @@ var PHANTOM_SCRIPT = Assets.getText("phantom_script.js");
 WebApp.connectHandlers.use(function (req, res, next) {
   // _escaped_fragment_ comes from Google's AJAX crawling spec:
   // https://developers.google.com/webmasters/ajax-crawling/docs/specification
-  // This spec was designed during the brief era where using "#!" URLs was
-  // common, so it mostly describes how to translate "#!" URLs into
-  // _escaped_fragment_ URLs. Since then, "#!" URLs have gone out of style, but
-  // the <meta name="fragment" content="!"> (see spiderable.html) approach also
-  // described in the spec is still common and used by several crawlers.
   if (/\?.*_escaped_fragment_=/.test(req.url) ||
       _.any(Spiderable.userAgentRegExps, function (re) {
         return re.test(req.headers['user-agent']); })) {