Revert of bluetooth: Add device list retrieval for chrome://bluetooth-internals

device/bluetooth/public/interfaces/adapter.mojom

-// Copyright 2016 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.
-
-module bluetooth.mojom;
-
-struct DeviceInfo {
-  string? name;
-  string name_for_display;
-  string id;
-  string address;
-};
-
-interface Adapter {
-  // Retrieves the list of the devices known by the adapter including Connected
-  // Devices, GATT Connected Devices, Paired Devices and Devices discovered
-  // during a classic or low-energy scan.
-  GetDevices() => (array<DeviceInfo> devices);
-
-  // Sets the client that listens for the adapter's events.
-  SetClient(AdapterClient client);
-};
-
-interface AdapterClient {
-  // Called the first time a device is discovered.
-  DeviceAdded(DeviceInfo device);
-
-  // Called after the device hasn't been seen for 3 minutes.
-  DeviceRemoved(DeviceInfo device);
-};