Update comment, remove code in chromevox ext demo.

demo/chromevox.html

@@ -24,7 +24,7 @@
 
 <!-- load ace -->
 <script src="../build/src/ace.js"></script>
-<!-- load ace language tools -->
+<!-- load ace accessibility extension -->
 <script src="../build/src/ext-chromevox.js"></script>
 <script>
     // trigger extension
@@ -32,11 +32,6 @@
     var editor = ace.edit("editor");
     editor.session.setMode("ace/mode/html");
     editor.setTheme("ace/theme/tomorrow");
-    // enable autocompletion and snippets
-    editor.setOptions({
-        enableBasicAutocompletion: true,
-        enableSnippets: true
-    });
 </script>
 
 <script src="./show_own_source.js"></script>