USB: serial: keyspan_pda: drop unused driver data usb-serial pointer

The driver data usb-serial pointer is unused since commit 66c32e483355 ("USB: serial: keyspan_pda: drop redundant usb-serial pointer"), which apparently failed to remove the pointer as intended.

---
 drivers/usb/serial/keyspan_pda.c | 1 -
 1 file changed, 1 deletion(-)

index dd4cfd17f7ad..4ee0bdf98c0e 100644
@@ -31,7 +31,6 @@
 struct keyspan_pda_private {
 	int			tx_room;
 	struct work_struct	unthrottle_work;
-	struct usb_serial	*serial;
 	struct usb_serial_port	*port;
 	bool			throttled;
 	bool			throttle_req;

2.53.0