remoting: Cleanup class/struct fwd declarations

remoting/host/setup/daemon_controller_delegate_win.h

 // Copyright 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.
 
 #ifndef REMOTING_HOST_SETUP_DAEMON_CONTROLLER_DELEGATE_WIN_H_
 #define REMOTING_HOST_SETUP_DAEMON_CONTROLLER_DELEGATE_WIN_H_
 
 #include "base/macros.h"
 #include "remoting/host/setup/daemon_controller.h"
 
 namespace remoting {
 
-class DaemonInstallerWin;
-
 class DaemonControllerDelegateWin : public DaemonController::Delegate {
  public:
   DaemonControllerDelegateWin();
   ~DaemonControllerDelegateWin() override;
 
   // DaemonController::Delegate interface.
   DaemonController::State GetState() override;
   std::unique_ptr<base::DictionaryValue> GetConfig() override;
   void SetConfigAndStart(
       std::unique_ptr<base::DictionaryValue> config,
       bool consent,
       const DaemonController::CompletionCallback& done) override;
   void UpdateConfig(std::unique_ptr<base::DictionaryValue> config,
                     const DaemonController::CompletionCallback& done) override;
   void Stop(const DaemonController::CompletionCallback& done) override;
   DaemonController::UsageStatsConsent GetUsageStatsConsent() override;
 
   DISALLOW_COPY_AND_ASSIGN(DaemonControllerDelegateWin);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_SETUP_DAEMON_CONTROLLER_DELEGATE_WIN_H_