rcuscale: Stop testing RCU Tasks Rude asynchronous APIs

The call_rcu_tasks_rude() and rcu_barrier_tasks_rude() APIs are currently
unused.  Furthermore, the idea is to get rid of RCU Tasks Rude entirely
once all architectures have their deep-idle and entry/exit code correctly
marked as inline or noinstr.  As a step towards this goal, this commit
therefore removes these two functions from rcuscale testing.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>

kernel/rcu/rcuscale.c

@@ -333,8 +333,6 @@ static struct rcu_scale_ops tasks_rude_ops = {
 	.readunlock	= tasks_rude_scale_read_unlock,
 	.get_gp_seq	= rcu_no_completed,
 	.gp_diff	= rcu_seq_diff,
-	.async		= call_rcu_tasks_rude,
-	.gp_barrier	= rcu_barrier_tasks_rude,
 	.sync		= synchronize_rcu_tasks_rude,
 	.exp_sync	= synchronize_rcu_tasks_rude,
 	.rso_gp_kthread	= get_rcu_tasks_rude_gp_kthread,