net/sched: actions: remove unused 'order'

after commit 4097e9d250fb ("net: sched: don't use tc_action->order during
action dump"), 'act->order' is initialized but then it's no more read, so
we can just remove this member of struct tc_action.

CC: Ivan Vecera <[e-mail]>
Signed-off-by: Davide Caratti <[e-mail]>
Acked-by: Jiri Pirko <[e-mail]>
Reviewed-by: Ivan Vecera <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/net/act_api.h

···
 struct tc_action {
 	const struct tc_action_ops	*ops;
 	__u32				type; /* for backward compat(TCA_OLD_COMPAT) */
-	__u32				order;
 	struct tcf_idrinfo		*idrinfo;
 
 	u32				tcfa_index;

net/sched/act_api.c

···
 			err = PTR_ERR(act);
 			goto err;
 		}
-		act->order = i;
 		sz += tcf_action_fill_size(act);
 		/* Start from index 0 */
 		actions[i - 1] = act;