Remove PlatformClientAuth interface from upstream.

chromecast/common/platform_client_auth.h

Index: chromecast/common/platform_client_auth.h
diff --git a/chromecast/common/platform_client_auth.h b/chromecast/common/platform_client_auth.h
deleted file mode 100644
index e31801234e6d596d02ad31467d98d55a51518507..0000000000000000000000000000000000000000
--- a/chromecast/common/platform_client_auth.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2014 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.
-
-#ifndef CHROMECAST_COMMON_PLATFORM_CLIENT_AUTH_H_
-#define CHROMECAST_COMMON_PLATFORM_CLIENT_AUTH_H_
-
-namespace chromecast {
-
-class PlatformClientAuth {
- public:
-  static bool Initialize();
-
-private:
-  PlatformClientAuth() {}
-  ~PlatformClientAuth() {}
-
-  static bool initialized_;
-};
-
-}  // namespace chromecast
-
-#endif  // CHROMECAST_COMMON_PLATFORM_CLIENT_AUTH_H_