block, bfq: remove case of redirected bic from insert_request

Before commit 18e5a57d ("block, bfq: postpone rq preparation to
insert or merge"), the destination queue for a request was chosen by a
different hook than the one that then inserted the request. So, between
the execution of the two hooks, the bic of the process generating the
request could happen to be redirected to a different bfq_queue. As a
consequence, the destination bfq_queue stored in the request could be
wrong. Such an event does not need to ba handled any longer.
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/bfq-iosched.c

@@ -4633,8 +4633,6 @@ static bool __bfq_insert_request(struct bfq_data *bfqd, struct request *rq)
 	bool waiting, idle_timer_disabled = false;
 
 	if (new_bfqq) {
-		if (bic_to_bfqq(RQ_BIC(rq), 1) != bfqq)
-			new_bfqq = bic_to_bfqq(RQ_BIC(rq), 1);
 		/*
 		 * Release the request's reference to the old bfqq
 		 * and make sure one is taken to the shared queue.