sbitmap: Delete old sbitmap_queue_get_shallow()

Since __sbitmap_queue_get_shallow() was introduced in commit c05e66733788
("sbitmap: add sbitmap_get_shallow() operation"), it has not been used.

Delete __sbitmap_queue_get_shallow() and rename public
__sbitmap_queue_get_shallow() -> sbitmap_queue_get_shallow() as it is odd
to have public __foo but no foo at all.

Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1644322024-105340-1-git-send-email-john.garry@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 845f74e..0fd409b 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -107,7 +107,7 @@ static int __blk_mq_get_tag(struct blk_mq_alloc_data *data,
 		return BLK_MQ_NO_TAG;
 
 	if (data->shallow_depth)
-		return __sbitmap_queue_get_shallow(bt, data->shallow_depth);
+		return sbitmap_queue_get_shallow(bt, data->shallow_depth);
 	else
 		return __sbitmap_queue_get(bt);
 }