Revert "block/wbt: fix negative inflight counter when remove scsi device"

hulk inclusion
category: bugfix
bugzilla: 187584, https://gitee.com/openeuler/kernel/issues/I5QW2R
CVE: NA

--------------------------------

This reverts commit 36f5d766.

There are two wbt_enable_default() in bfq_exit_queue(). Although it will
not lead to no fault, revert one.
Signed-off-by: NLi Nan <linan122@huawei.com>
Reviewed-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

block/bfq-iosched.c

@@ -6418,8 +6418,6 @@ static void bfq_exit_queue(struct elevator_queue *e)
 	spin_unlock_irq(&bfqd->lock);
 #endif
 
-	wbt_enable_default(bfqd->queue);
-
 	kfree(bfqd);
 
 	/* Re-enable throttling in case elevator disabled it */