Cleanup: Remove the "documentation_permissions_required" JSON schema key. It is

chrome/common/extensions/api/runtime.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": "runtime",
     "description": "Use the <code>chrome.runtime</code> API to retrieve the background page, return details about the manifest, and listen for and respond to events in the app or extension lifecycle. You can also use this API to convert the relative path of URLs to fully-qualified URLs.",
-    "documentation_permissions_required": ["runtime"],
     "types": [
       {
         "id": "Port",
         "type": "object",
         "nocompile": true,
         "description": "An object which allows two way communication with other pages.",
         "properties": {
           "name": {"type": "string"},
           "disconnect": { "type": "function" },
           "onDisconnect": { "$ref": "events.Event" },
@@ skipping 436 matching lines @@
             "type": "string",
             "name": "reason",
             "description": "The reason that the event is being dispatched. 'app_update' is used when the restart is needed because the application is updated to a newer version. 'os_update' is used when the restart is needed because the browser/OS is updated to a newer version. 'periodic' is used when the system runs for more than the permitted uptime set in the enterprise policy.",
             "enum": ["app_update", "os_update", "periodic"]
           }
         ]
       }
     ]
   }
 ]