blk-mq: delete dead struct blk_mq_hw_ctx->queued field

This counter is not used anywhere, so delete it.

Signed-off-by: Chengming Zhou <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

Author: Chengming Zhou

include/linux/blk-mq.h

@@ -397,8 +397,6 @@ struct blk_mq_hw_ctx {
 	 */
 	struct blk_mq_tags	*sched_tags;
 
-	/** @queued: Number of queued requests. */
-	unsigned long		queued;
 	/** @run: Number of dispatched requests. */
 	unsigned long		run;