Remove PlatformClientAuth interface from upstream.

chromecast/common/platform_client_auth_simple.cc

Index: chromecast/common/platform_client_auth_simple.cc
diff --git a/chromecast/common/platform_client_auth_simple.cc b/chromecast/common/platform_client_auth_simple.cc
deleted file mode 100644
index 481b9a9ca5e0e0714a9b69f7b6f5592f32225ca1..0000000000000000000000000000000000000000
--- a/chromecast/common/platform_client_auth_simple.cc
+++ /dev/null
@@ -1,18 +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.
-
-#include "chromecast/common/platform_client_auth.h"
-
-namespace chromecast {
-
-// static
-bool PlatformClientAuth::initialized_ = false;
-
-// static
-bool PlatformClientAuth::Initialize() {
-  initialized_ = true;
-  return true;
-}
-
-}  // namespace chromecast