Revert "block: release rq qos structures for queue without disk"

This reverts commit daaca3522a.

Commit daaca3522a ("block: release rq qos structures for queue without
disk") is only needed for v5.15~v5.17, and isn't needed for v5.18, so
revert it.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220426024936.3321341-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-core.c

@@ -50,7 +50,6 @@
 #include "blk-pm.h"
 #include "blk-cgroup.h"
 #include "blk-throttle.h"
-#include "blk-rq-qos.h"
 
 struct dentry *blk_debugfs_root;
 
@@ -315,9 +314,6 @@ void blk_cleanup_queue(struct request_queue *q)
 	 */
 	blk_freeze_queue(q);
 
-	/* cleanup rq qos structures for queue without disk */
-	rq_qos_exit(q);
-
 	blk_queue_flag_set(QUEUE_FLAG_DEAD, q);
 
 	blk_sync_queue(q);