Clean up DevTools API docs following removal of old APIs

chrome/common/extensions/api/devtools/inspected_window.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": "devtools.inspectedWindow",
     "description": "Use the <code>chrome.devtools.inspectedWindow</code> API to interact with the inspected window: obtain the tab ID for the inspected page, evaluate the code in the context of the inspected window, reload the page, or obtain the list of resources within the page.",
     "nocompile": true,
     "types": [
@@ skipping 172 matching lines @@
               },
               "userAgent": {
                 "type": "string",
                 "optional": true,
                 "description": "If specified, the string will override the value of the <code>User-Agent</code> HTTP header that's sent while loading the resources of the inspected page. The string will also override the value of the <code>navigator.userAgent</code> property that's returned to any scripts that are running within the inspected page."
               },
               "injectedScript": {
                 "type": "string",
                 "optional": true,
                 "description": "If specified, the script will be injected into every frame of the inspected page immediately upon load, before any of the frame's scripts. The script will not be injected after subsequent reloads&mdash;for example, if the user presses Ctrl+R."
-              },
-              "preprocessorScript": {
-                "type": "string",
-                "deprecated": "Please avoid using this parameter, it will be removed soon.",
-                "optional": true,
-                "description": "If specified, this script evaluates into a function that accepts three string arguments: the source to preprocess, the URL of the source, and a function name if the source is an DOM event handler. The preprocessorerScript function should return a string to be compiled by Chrome in place of the input source. In the case that the source is a DOM event handler, the returned source must compile to a single JS function."
               }
             }
           }
         ]
       },
       {
         "name": "getResources",
         "type": "function",
         "description": "Retrieves the list of resources from the inspected page.",
         "parameters": [
@@ skipping 35 matching lines @@
           {
             "name": "content",
             "type": "string",
             "description": "New content of the resource."
           }
         ]
       }
     ]
   }
 ]