can: c_can: remove wrong comment

The comment referred to a status (warning) other than the one that was
being managed (active error).

Link: https://lore.kernel.org/all/20220716170112.2020291-1-dario.binacchi@amarulasolutions.comSigned-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/c_can/c_can_main.c

@@ -952,7 +952,6 @@ static int c_can_handle_state_change(struct net_device *dev,
 
 	switch (error_type) {
 	case C_CAN_NO_ERROR:
-		/* error warning state */
 		cf->can_id |= CAN_ERR_CRTL;
 		cf->data[1] = CAN_ERR_CRTL_ACTIVE;
 		cf->data[6] = bec.txerr;