staging: rts5139: remove unused polling_time variable

Signed-off-by: Oleksij Rempel <bug-track@fisher-privat.net>
Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rts5139/rts51x.c

@@ -517,7 +517,6 @@ static void rts51x_init_options(struct rts51x_chip *chip)
 	option->sd20_pad_drive = 0;
 	option->reset_or_rw_fail_set_pad_drive = 1;
 	option->debounce_num = 2;
-	option->polling_time = 100;
 	option->led_toggle_interval = 6;
 	option->xd_rwn_step = 0;
 	option->sd_send_status_en = 0;

drivers/staging/rts5139/rts51x_chip.h

@@ -380,7 +380,6 @@ struct rts51x_option {
 	u8 reset_or_rw_fail_set_pad_drive;
 
 	u8 debounce_num;	/* debounce number */
-	int polling_time;	/* polling delay time */
 	u8 led_toggle_interval;	/* used to control led toggle speed */
 	int xd_rwn_step;
 	u8 sd_send_status_en;