USB: ssu100: remove explicit initialisation of disconnect

The disconnect callback is set to the generic implementation by
usb-serial core if NULL.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/ssu100.c

@@ -641,7 +641,6 @@ static struct usb_serial_driver ssu100_device = {
 	.get_icount	     = ssu100_get_icount,
 	.ioctl               = ssu100_ioctl,
 	.set_termios         = ssu100_set_termios,
-	.disconnect          = usb_serial_generic_disconnect,
 };
 
 static struct usb_serial_driver * const serial_drivers[] = {