Remove leftover audioModem and copresensePrivate features.

chrome/common/extensions/api/_permission_features.json

Index: chrome/common/extensions/api/_permission_features.json
diff --git a/chrome/common/extensions/api/_permission_features.json b/chrome/common/extensions/api/_permission_features.json
index fdd2255fc90a78f71cc796f6d59f4719e8f62273..538199468197fabff5eb42d2f8fea438f031e08b 100644
--- a/chrome/common/extensions/api/_permission_features.json
+++ b/chrome/common/extensions/api/_permission_features.json
@@ -48,23 +48,6 @@
       "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"],
@@ -203,14 +186,6 @@
     "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"],