staging: usbip: removed unused structure field

Signed-off-by: NBart Westgeest <bart@elbrys.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/usbip/stub.h

@@ -35,7 +35,6 @@
 struct stub_device {
 	struct usb_interface *interface;
 	struct usb_device *udev;
-	struct list_head list;
 
 	struct usbip_device ud;
 	__u32 devid;