RDMA: Remove outdated comments referencing hfi1_destroy_qp()

The function hfi1_destroy_qp() was removed in commit
75261cc ("staging/rdma/hfi1: Remove destroy qp verb") in
favor of the rdmavt generic rvt_destroy_qp().  Two comments
still reference hfi1_destroy_qp() as the waiter that
rvt_put_qp() will wake up.  As Leon Romanovsky noted, these
comments add no value.  Remove them.

Suggested-by: Leon Romanovsky <leon@kernel.org>
Assisted-by: unnamed:deepseek-v3.2 coccinelle
Signed-off-by: Kexin Sun <kexinsun@smail.nju.edu.cn>
Link: https://patch.msgid.link/20260323134450.2478-1-kexinsun@smail.nju.edu.cn
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: Kexin Sun

drivers/infiniband/hw/hfi1/qp.c

@@ -404,7 +404,6 @@ void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag)
 		hfi1_qp_schedule(qp);
 	}
 	spin_unlock_irqrestore(&qp->s_lock, flags);
-	/* Notify hfi1_destroy_qp() if it is waiting. */
 	rvt_put_qp(qp);
 }
 

drivers/infiniband/sw/rdmavt/mcast.c

@@ -49,7 +49,6 @@ static void rvt_mcast_qp_free(struct rvt_mcast_qp *mqp)
 {
 	struct rvt_qp *qp = mqp->qp;
 
-	/* Notify hfi1_destroy_qp() if it is waiting. */
 	rvt_put_qp(qp);
 
 	kfree(mqp);