components: Cleanup class/struct fwd declarations

components/filesystem/file_system_app.h

 // Copyright 2015 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 COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_
 #define COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_
 
 #include "base/macros.h"
 #include "components/filesystem/directory_impl.h"
 #include "components/filesystem/file_system_impl.h"
 #include "components/filesystem/lock_table.h"
 #include "components/filesystem/public/interfaces/file_system.mojom.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
 #include "services/tracing/public/cpp/provider.h"
 
-namespace mojo {
-class Connector;
-}
-
 namespace filesystem {
 
 class FileSystemApp
     : public service_manager::Service,
       public service_manager::InterfaceFactory<mojom::FileSystem> {
  public:
   FileSystemApp();
   ~FileSystemApp() override;
 
  private:
@@ skipping 12 matching lines @@
   tracing::Provider tracing_;
 
   scoped_refptr<LockTable> lock_table_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystemApp);
 };
 
 }  // namespace filesystem
 
 #endif  // COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_