Delete the old hotwording integration.

extensions/common/api/_permission_features.json

 // Copyright 2014 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.
 
 // This features file defines permissions for extension APIs implemented
 // under src/extensions.
 
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
@@ skipping 106 matching lines @@
     {
       "channel": "stable",
       "extension_types": ["platform_app"]
     },
     {
       "channel": "stable",
       "extension_types": ["extension"],
       "whitelist": [
         // http://crbug.com/292856
         "3F50C3A83839D9C76334BCE81CDEC06174F266AF",
-        "09FDCB5851B8F3378DB630D06E316076E89C95A6",
         "39BE69F11F68E4EED080DA3DC2394F7885B7AFF9",
         "FF78670081967CE21DB86A04AD94A0498F01E20A",
         // Hotword component extension
         "62CCAAD339E6451BBF97C4BBDF758E934A05AD0B"
       ]
     }
   ],
   "bluetoothPrivate": {
     "channel": "stable",
     "extension_types": ["platform_app"],
@@ skipping 266 matching lines @@
   "videoCapture": [
     {
       "channel": "stable",
       "extension_types": ["platform_app"]
     },
     {
       "channel": "stable",
       "extension_types": ["extension"],
       "whitelist": [
         // http://crbug.com/292856
-        "09FDCB5851B8F3378DB630D06E316076E89C95A6",
         "A434B90223C3C52F2B69DB494736B63C612C774D"
       ]
     }
   ],
   "virtualKeyboardPrivate": {
     "channel": "stable",
     "extension_types": ["extension"],
     "platforms": ["chromeos"],
     "whitelist": [
       "3F50C3A83839D9C76334BCE81CDEC06174F266AF",  // System-level virtual kbd
@@ skipping 14 matching lines @@
   },
   "webRequest": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
    },
   "webRequestBlocking": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   }
 }