[filesapp] Remove (c) chromeos/components/file_manager copyright notice

No "(c)" in chrome project copyright notices. Comment only change.

No-try: true
Bug: 1113981
Change-Id: I35202f41caeff12d3fdae794ae7c6a74af27939f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2542927Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827976}

chromeos/components/file_manager/file_manager_page_handler.cc

-// Copyright (c) 2020 The Chromium Authors. All rights reserved.
+// Copyright 2020 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.
 

chromeos/components/file_manager/file_manager_page_handler.h

-// Copyright (c) 2020 The Chromium Authors. All rights reserved.
+// Copyright 2020 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.
 

chromeos/components/file_manager/file_manager_ui.cc

-// Copyright (c) 2020 The Chromium Authors. All rights reserved.
+// Copyright 2020 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.
 

chromeos/components/file_manager/file_manager_ui.h

-// Copyright (c) 2020 The Chromium Authors. All rights reserved.
+// Copyright 2020 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.
 

chromeos/components/file_manager/resources/main.js

-// Copyright (c) 2020 The Chromium Authors. All rights reserved.
+// Copyright 2020 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.