block: remove the duplicated setting for congestion_threshold

Before call the blk_queue_congestion_threshold(),
the blk_queue_congestion_threshold() is already called at blk_queue_make_rquest().
Because this code is the duplicated, it has removed.

Signed-off-by: Jaehoon Chung <[e-mail]>
Signed-off-by: Kyungmin Park <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

block/blk-core.c

···
 	if (elevator_init(q, NULL))
 		return NULL;
 
-	blk_queue_congestion_threshold(q);
-
 	/* all done, end the initial bypass */
 	blk_queue_bypass_end(q);
 	return q;