Removing references to legacy packaged apps across extension docs.

chrome/common/extensions/docs/server2/templates/intros/tts.html

 <p id="classSummary">
 Use the <code>chrome.tts</code> module to play synthesized
-text-to-speech (TTS) from your extension or packaged app.
+text-to-speech (TTS).
 See also the related
 <a href="ttsEngine.html">ttsEngine</a>
 module, which allows an extension to implement a speech engine.
 </p>
 
 
 <h2 id="overview">Overview</h2>
 
 <p>You must declare the "tts" permission
 in your extension's manifest to use this API.
@@ skipping 163 matching lines @@
     function(voices) {
       for (var i = 0; i < voices.length; i++) {
         console.log('Voice ' + i + ':');
         console.log('  name: ' + voices[i].voiceName);
         console.log('  lang: ' + voices[i].lang);
         console.log('  gender: ' + voices[i].gender);
         console.log('  extension id: ' + voices[i].extensionId);
         console.log('  event types: ' + voices[i].eventTypes);
       }
     });</pre>