Remove all blimp client code.

blimp/client/core/settings/user_agent.h

Index: blimp/client/core/settings/user_agent.h
diff --git a/blimp/client/core/settings/user_agent.h b/blimp/client/core/settings/user_agent.h
deleted file mode 100644
index dcfe2405f4c2bf25d142e54c434ec68f491599d6..0000000000000000000000000000000000000000
--- a/blimp/client/core/settings/user_agent.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// 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.
-
-#ifndef BLIMP_CLIENT_CORE_SETTINGS_USER_AGENT_H_
-#define BLIMP_CLIENT_CORE_SETTINGS_USER_AGENT_H_
-
-#include <string>
-
-namespace blimp {
-namespace client {
-
-/**
- * Builds a User-agent compatible string that describes the OS and CPU type.
- * e.g. Linux; Android 5.1.1; Nexus 6 Build/LMY49C
- */
-std::string GetOSVersionInfoForUserAgent();
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_CORE_SETTINGS_USER_AGENT_H_