Input: iforce - remove empty multiline comments

Those are remnants of the SPDX identifier migration, which haven't been
removed properly.
Signed-off-by: Tim Schumacher <timschumi@gmx.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/joystick/iforce/iforce-ff.c

@@ -6,9 +6,6 @@
  *  USB/RS232 I-Force joysticks and wheels.
  */
 
-/*
- */
-
 #include "iforce.h"
 
 /*

drivers/input/joystick/iforce/iforce-main.c

@@ -6,9 +6,6 @@
  *  USB/RS232 I-Force joysticks and wheels.
  */
 
-/*
- */
-
 #include <asm/unaligned.h>
 #include "iforce.h"
 

drivers/input/joystick/iforce/iforce-packets.c

@@ -6,9 +6,6 @@
  *  USB/RS232 I-Force joysticks and wheels.
  */
 
-/*
- */
-
 #include <asm/unaligned.h>
 #include "iforce.h"
 

drivers/input/joystick/iforce/iforce-serio.c

@@ -6,9 +6,6 @@
  *  USB/RS232 I-Force joysticks and wheels.
  */
 
-/*
- */
-
 #include <linux/serio.h>
 #include "iforce.h"
 

drivers/input/joystick/iforce/iforce-usb.c

@@ -6,9 +6,6 @@
  *  USB/RS232 I-Force joysticks and wheels.
  */
 
-/*
- */
-
 #include <linux/usb.h>
 #include "iforce.h"
 

drivers/input/joystick/iforce/iforce.h

@@ -6,9 +6,6 @@
  *  USB/RS232 I-Force joysticks and wheels.
  */
 
-/*
- */
-
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/input.h>