Remove all blimp client code.

blimp/client/app/linux/blimp_client_context_delegate_linux.h

-// 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_APP_LINUX_BLIMP_CLIENT_CONTEXT_DELEGATE_LINUX_H_
-#define BLIMP_CLIENT_APP_LINUX_BLIMP_CLIENT_CONTEXT_DELEGATE_LINUX_H_
-
-#include "blimp/client/public/blimp_client_context_delegate.h"
-#include "google_apis/gaia/identity_provider.h"
-
-namespace blimp {
-namespace client {
-
-class BlimpContents;
-
-class BlimpClientContextDelegateLinux : public BlimpClientContextDelegate {
- public:
-  BlimpClientContextDelegateLinux();
-  ~BlimpClientContextDelegateLinux() override;
-
-  // BlimpClientContextDelegate implementation.
-  void AttachBlimpContentsHelpers(BlimpContents* blimp_contents) override;
-  void OnAssignmentConnectionAttempted(AssignmentRequestResult result,
-                                       const Assignment& assignment) override;
-  std::unique_ptr<IdentityProvider> CreateIdentityProvider() override;
-  void OnAuthenticationError(const GoogleServiceAuthError& error) override;
-  void OnConnected() override;
-  void OnEngineDisconnected(int result) override;
-  void OnNetworkDisconnected(int result) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BlimpClientContextDelegateLinux);
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_APP_LINUX_BLIMP_CLIENT_CONTEXT_DELEGATE_LINUX_H_