chromeos: Remove Introspectable D-Bus client library

chromeos/dbus/fake_introspectable_client.cc

-// Copyright 2013 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.
-
-#include "chromeos/dbus/fake_introspectable_client.h"
-
-#include "base/callback.h"
-#include "base/logging.h"
-#include "dbus/object_path.h"
-
-namespace chromeos {
-
-FakeIntrospectableClient::FakeIntrospectableClient() {}
-
-FakeIntrospectableClient::~FakeIntrospectableClient() {}
-
-void FakeIntrospectableClient::Init(dbus::Bus* bus) {}
-
-void FakeIntrospectableClient::Introspect(const std::string& service_name,
-                                          const dbus::ObjectPath& object_path,
-                                          const IntrospectCallback& callback) {
-  VLOG(1) << "Introspect: " << service_name << " " << object_path.value();
-  callback.Run(service_name, object_path, "", false);
-}
-
-}  // namespace chromeos