sctp: remove the unnecessary sinfo_stream check in sctp_prsctp_prune_unsent

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2160516
Tested: compile only

commit 9f0b773
Author: Xin Long <lucien.xin@gmail.com>
Date:   Fri Nov 4 17:45:15 2022 -0400

    sctp: remove the unnecessary sinfo_stream check in sctp_prsctp_prune_unsent

    Since commit 5bbbbe3 ("sctp: introduce stream scheduler foundations"),
    sctp_stream_outq_migrate() has been called in sctp_stream_init/update to
    removes those chunks to streams higher than the new max. There is no longer
    need to do such check in sctp_prsctp_prune_unsent().

    Signed-off-by: Xin Long <lucien.xin@gmail.com>
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Xin Long <lxin@redhat.com>

Author: Xin Long

net/sctp/outqueue.c

@@ -384,6 +384,7 @@ static int sctp_prsctp_prune_unsent(struct sctp_association *asoc,
 {
 	struct sctp_outq *q = &asoc->outqueue;
 	struct sctp_chunk *chk, *temp;
+	struct sctp_stream_out *sout;
 
 	q->sched->unsched_all(&asoc->stream);
 
@@ -398,12 +399,9 @@ static int sctp_prsctp_prune_unsent(struct sctp_association *asoc,
 		sctp_sched_dequeue_common(q, chk);
 		asoc->sent_cnt_removable--;
 		asoc->abandoned_unsent[SCTP_PR_INDEX(PRIO)]++;
-		if (chk->sinfo.sinfo_stream < asoc->stream.outcnt) {
-			struct sctp_stream_out *streamout =
-				SCTP_SO(&asoc->stream, chk->sinfo.sinfo_stream);
 
-			streamout->ext->abandoned_unsent[SCTP_PR_INDEX(PRIO)]++;
-		}
+		sout = SCTP_SO(&asoc->stream, chk->sinfo.sinfo_stream);
+		sout->ext->abandoned_unsent[SCTP_PR_INDEX(PRIO)]++;
 
 		msg_len -= chk->skb->truesize + sizeof(struct sctp_chunk);
 		sctp_chunk_free(chk);