t/btrace2fio: don't dec inflight for requeue

We don't inc it again on issue, so we'll end up with an assert
trigger on inflight going negative.

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/t/btrace2fio.c b/t/btrace2fio.c
index efe25c4..04d4a28 100644
--- a/t/btrace2fio.c
+++ b/t/btrace2fio.c
@@ -365,8 +365,6 @@
 	if (act == __BLK_TA_QUEUE) {
 		inflight_add(p, t->sector, t->bytes);
 		ret = handle_queue_trace(t, p);
-	} else if (act == __BLK_TA_REQUEUE) {
-		p->o.inflight--;
 	} else if (act == __BLK_TA_BACKMERGE) {
 		struct inflight *i;