can: mscan: remove unused struct 'mscan_state'

'mscan_state' is unused since the original
commit afa17a50 ("net/can: add driver for mscan family &
mpc52xx_mscan").

Remove it.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/all/20240525232509.191735-1-linux@treblig.orgSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/mscan/mscan.c

@@ -34,12 +34,6 @@ static const struct can_bittiming_const mscan_bittiming_const = {
 	.brp_inc = 1,
 };
 
-struct mscan_state {
-	u8 mode;
-	u8 canrier;
-	u8 cantier;
-};
-
 static enum can_state state_map[] = {
 	CAN_STATE_ERROR_ACTIVE,
 	CAN_STATE_ERROR_WARNING,