can: gs_usb: gs_usb_disconnect(): remove not needed usb_kill_anchored_urbs()

In gs_usb_disconnect(), all channels are destroyed first, then all
anchored RX URBs (parent->rx_submitted) are disposed with
usb_kill_anchored_urbs().

The call to usb_kill_anchored_urbs() is not needed, as
gs_destroy_candev() of the last active channel already disposes the RX
URBS.

Remove not needed call to usb_kill_anchored_urbs() from
gs_usb_disconnect().

Link: https://lore.kernel.org/all/20230718-gs_usb-cleanups-v1-11-c3b9154ec605@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/usb/gs_usb.c

@@ -1471,7 +1471,6 @@ static void gs_usb_disconnect(struct usb_interface *intf)
 		if (parent->canch[i])
 			gs_destroy_candev(parent->canch[i]);
 
-	usb_kill_anchored_urbs(&parent->rx_submitted);
 	kfree(parent);
 }