Revert 124660 - Allow comments in extension config files.

chrome/common/extensions/api/experimental.keybinding.json

-// Copyright (c) 2012 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.
-
 [
   {
     "namespace": "experimental.keybinding",
     "events": [
       {
         "name": "onCommand",
         "description": "Fired when a registered command is activated using a keyboard shortcut.",
         "type": "function",
         "parameters": [
           {
             "name": "command",
             "type": "string"
           }
         ]
       }
     ]
   }
 ]