dbus: Remove unused MockCrasAudioClient.

chromeos/dbus/mock_cras_audio_client.cc

Index: chromeos/dbus/mock_cras_audio_client.cc
diff --git a/chromeos/dbus/mock_cras_audio_client.cc b/chromeos/dbus/mock_cras_audio_client.cc
deleted file mode 100644
index 31f21e5f822a39506f7168373459f846b03ab09f..0000000000000000000000000000000000000000
--- a/chromeos/dbus/mock_cras_audio_client.cc
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 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/mock_cras_audio_client.h"
-
-
-namespace chromeos {
-
-MockCrasAudioClient::MockCrasAudioClient() {}
-MockCrasAudioClient::~MockCrasAudioClient() {}
-
-}  // namespace chromeos