[PATCH -next] block: remove unused but set variable 'hctx'

[Wei Yongjun <weiyongjun1@huawei.com>]

From: Hulk Robot <hulkci@huawei.com>

After commit 37f4a24c2469 ("blk-mq: centralise related handling
into blk_mq_get_driver_tag"), 'hctx' is never be used. Gcc report
build warning:

block/blk-flush.c:222:24: warning:
 variable hctx set but not used [-Wunused-but-set-variable]
  222 |  struct blk_mq_hw_ctx *hctx;
      |                        ^~~~

Just removing it to avoid build warning.

Signed-off-by: Hulk Robot <hulkci@huawei.com>
---
 block/blk-flush.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/block/blk-flush.c b/block/blk-flush.c
index e756db088d84..a20fe125e9fa 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -219,7 +219,6 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error)
 	struct request *rq, *n;
 	unsigned long flags = 0;
 	struct blk_flush_queue *fq = blk_get_flush_queue(q, flush_rq->mq_ctx);
-	struct blk_mq_hw_ctx *hctx;
 
 	blk_account_io_flush(flush_rq);
 
@@ -235,7 +234,6 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error)
 	if (fq->rq_status != BLK_STS_OK)
 		error = fq->rq_status;
 
-	hctx = flush_rq->mq_hctx;
 	if (!q->elevator)
 		flush_rq->tag = BLK_MQ_NO_TAG;
 	else