Remove leftover audioModem and copresensePrivate features.

chrome/common/extensions/api/_permission_features.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.
 
 // This features file defines permissions for extension APIs implemented
 // under src/chrome.
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
 // To add a new whitelisted ID, SHA-1 it and force it to uppercase. In Bash:
@@ skipping 30 matching lines @@
   "activityLogPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "platform_app"],
     "whitelist": [
       "EE17C698905F7F2E6DDC87C9C30F11E164C829F4",  // For unit testing ALP
       "C50DC2AC31D826BC977032AF12DE4694CC8467DC",  // For unit testing ALP
       "AE27D69DBE571F4B1694F05C89B710C646792231",  // Published ADT.
       "5107DE9024C329EEA9C9A72D94C16723790C6422"   // Apps Developer Tool Dev.
     ]
   },
-  "audioModem": [
-    {
-      "channel": "dev",
-      "extension_types": ["extension", "platform_app"]
-    },
-    {
-      "channel": "stable",
-      "extension_types": ["extension", "platform_app"],
-      "whitelist": [
-        "05EBA3051DFCA6AF17070AEE5FE8C66322FF4738",  // http://crbug.com/431978
-        "11B478CEC461C766A2DC1E5BEEB7970AE06DC9C2",  // http://crbug.com/458218
-        "0EFB879311E9EFBB7C45251F89EC655711B1F6ED",  // http://crbug.com/458218
-        "9193D3A51E2FE33B496CDA53EA330423166E7F02",  // http://crbug.com/458218
-        "F9119B8B18C7C82B51E7BC6FF816B694F2EC3E89"   // http://crbug.com/458218
-      ]
-    }
-  ],
   "autofillPrivate": {
     "channel": "trunk",
     "extension_types": ["extension", "platform_app"],
     "location": "component"
   },
   "autotestPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"],
     "location": "component"
   },
@@ skipping 118 matching lines @@
     "extension_types": ["extension", "legacy_packaged_app"]
   },
   "contextMenus": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"]
   },
   "cookies": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   },
-  "copresencePrivate": {
-    "channel": "stable",
-    "extension_types": ["extension"],
-    "location": "component",
-    "whitelist": [
-      "AFA728615D3A82D4017BDECEE86978543194D198"  // Whispernet Proxy
-    ]
-  },
   "cryptotokenPrivate": {
     "channel": "stable",
     "extension_types": ["extension"],
     "location": "component",
     "whitelist": [
       "E24F1786D842E91E74C27929B0B3715A4689A473"  // Cryptotoken
     ]
   },
   "dataReductionProxy": {
     "channel": "stable",
@@ skipping 788 matching lines @@
     "channel": "stable",
     "extension_types": ["platform_app"],
     "platforms": ["chromeos"],
     "whitelist": [
       "A948368FC53BE437A55FEB414106E207925482F5",  // Files app
       "8C726564C6DBE7380BAB388DE6CC7EC93EB44B06",  // Video player
       "5065C83E84321221675D20FBE4DC43C655CC8C6F"   // Files app tests
     ]
   }
 }