USB: Follow-up to SPDX identifiers addition - remove now useless comments

All these files have been updated in the commit given in the Fixes: tag
below.

When the SPDX-License-Identifier: has been added, the corresponding text at
the beginning of the files has not been deleted.
All these texts are about GPL-2.0, with different variation in the wording.

Remove these now useless lines to save some LoC.

Fixes: 5fd54ace4721 ("USB: add SPDX identifiers to all remaining files in drivers/usb/")
Signed-off-by: Christophe JAILLET <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

include/linux/usb/audio-v2.h

···
 /*
  * Copyright (c) 2010 Daniel Mack <[e-mail]>
  *
- * This software is distributed under the terms of the GNU General Public
- * License ("GPL") version 2, as published by the Free Software Foundation.
- *
  * This file holds USB constants and structures defined
  * by the USB Device Class Definition for Audio Devices in version 2.0.
  * Comments below reference relevant sections of the documents contained

include/linux/usb/audio.h

···
  * Developed for Thumtronics by Grey Innovation
  * Ben Williamson <[e-mail]>
  *
- * This software is distributed under the terms of the GNU General Public
- * License ("GPL") version 2, as published by the Free Software Foundation.
- *
  * This file holds USB constants and structures defined
  * by the USB Device Class Definition for Audio Devices.
  * Comments below reference relevant sections of that document:

include/linux/usb/cdc-wdm.h

···
  * USB CDC Device Management subdriver
  *
  * Copyright (c) 2012  Bjørn Mork <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
  */
 
 #ifndef __LINUX_USB_CDC_WDM_H

include/linux/usb/cdc.h

···
  * USB CDC common helpers
  *
  * Copyright (c) 2015 Oliver Neukum <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
  */
 #ifndef __LINUX_USB_CDC_H
 #define __LINUX_USB_CDC_H

include/linux/usb/gadget.h

···
  *
  * (C) Copyright 2002-2004 by David Brownell
  * All Rights Reserved.
- *
- * This software is licensed under the GNU GPL version 2.
  */
 
 #ifndef __LINUX_USB_GADGET_H

include/linux/usb/input.h

···
 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2005 Dmitry Torokhov
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #ifndef __LINUX_USB_INPUT_H

include/linux/usb/isp1301.h

···
  * NXP ISP1301 USB transceiver driver
  *
  * Copyright (C) 2012 Roland Stigge <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * 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.
- *
  */
 
 #ifndef __LINUX_USB_ISP1301_H

include/linux/usb/m66592.h

···
  * M66592 driver platform data
  *
  * Copyright (C) 2009  Renesas Solutions Corp.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
  */
 
 #ifndef __LINUX_USB_M66592_H

include/linux/usb/of.h

···
 // SPDX-License-Identifier: GPL-2.0
 /*
  * OF helpers for usb devices.
- *
- * This file is released under the GPLv2
  */
 
 #ifndef __LINUX_USB_OF_H

include/linux/usb/r8a66597.h

···
  * Copyright (C) 2009  Renesas Solutions Corp.
  *
  * Author : Yoshihiro Shimoda <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
  */
 
 #ifndef __LINUX_USB_R8A66597_H

include/linux/usb/serial.h

···
  *
  *	Copyright (C) 1999 - 2012
  *	    Greg Kroah-Hartman ([e-mail])
- *
- *	This program is free software; you can redistribute it and/or modify
- *	it under the terms of the GNU General Public License as published by
- *	the Free Software Foundation; version 2 of the License.
- *
  */
 
 #ifndef __LINUX_USB_SERIAL_H

include/linux/usb/storage.h

···
  *
  * This file contains definitions taken from the
  * USB Mass Storage Class Specification Overview
- *
- * Distributed under the terms of the GNU GPL, version two.
  */
 
 /* Storage subclass codes */

include/linux/usb/tegra_usb_phy.h

···
 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2010 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.
- *
  */
 
 #ifndef __TEGRA_USB_PHY_H

include/linux/usb/ulpi.h

···
  * ulpi.h -- ULPI defines and function prorotypes
  *
  * Copyright (C) 2010 Nokia Corporation
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * version 2 of that License.
  */
 
 #ifndef __LINUX_USB_ULPI_H

include/linux/usb/xhci-dbgp.h

···
  * Copyright (C) 2016 Intel Corporation
  *
  * Author: Lu Baolu <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #ifndef __LINUX_XHCI_DBGP_H