Remove JS summary.

remoting/tools/javascript_key_tester/main.js

 /* Copyright (c) 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 function onLoad() {
-  var jsLog = document.getElementById('javascript-log');
   var pnaclLog = document.getElementById('pnacl-log');
   var pnaclPlugin = document.getElementById('pnacl-plugin');
   var pnaclListener = document.getElementById('pnacl-listener');
   var textLog = document.getElementById('text-log');
   var textLogContainer = document.getElementById('text-log-container');
 
-  var eventListeners = new EventListeners(jsLog, pnaclLog, textLog,
+  var eventListeners = new EventListeners(pnaclLog, textLog,
                                           pnaclPlugin, pnaclListener);
   eventListeners.activate();
 
   document.getElementById('clear-log').addEventListener(
       'click',
       function() {
-        jsLog.innerText = '';
         pnaclLog.innerText = '';
         textLog.innerText = '';
       },
       false);
   document.getElementById('show-log').addEventListener(
       'click',
       function() {
         eventListeners.deactivate();
         textLogContainer.hidden = false;
 
         var selection = window.getSelection();
         var range = document.createRange();
         range.selectNodeContents(textLog);
         selection.removeAllRanges();
         selection.addRange(range);
       },
       false);
   document.getElementById('hide-log').addEventListener(
       'click',
       function() {
         eventListeners.activate();
         textLogContainer.hidden = true;
       },
       false);
 }
 
 window.addEventListener('load', onLoad, false);