platform: goldfish: pipe: Remove license boilerplate

The boilerplate license is not necessary when the SPDX line is
present.
Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/platform/goldfish/goldfish_pipe_qemu.h

 /* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2018 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
 /*
  * IMPORTANT: The following constants must match the ones used and defined in
  * external/qemu/include/hw/misc/goldfish_pipe.h