vme_user.c: remove duplicated include

Signed-off-by: Duan Jiong <djduanjiong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vme/devices/vme_user.c

@@ -31,7 +31,6 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/syscalls.h>
-#include <linux/mutex.h>
 #include <linux/types.h>
 
 #include <linux/io.h>