Staging: comedi: comedi_fops: Remove unused stat.h header

Unused after commit 6e302939 ("staging: comedi: comedi_fops:
coding style fixes") - Fixed coding style in comedi_fops.c
Symbolic to octal permission.

Anyway it's included in module.h
Signed-off-by: Cheah Kok Cheong <thrust73@gmail.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi_fops.c

@@ -33,7 +33,6 @@
 #include <linux/fs.h>
 #include "comedidev.h"
 #include <linux/cdev.h>
-#include <linux/stat.h>
 
 #include <linux/io.h>
 #include <linux/uaccess.h>