block: Remove blkdev_get_by_*() functions

community inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8KPBR
Reference: https://lore.kernel.org/all/20230927093442.25915-29-jack@suse.cz/



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

blkdev_get_by_*() and blkdev_put() functions are now unused. Remove
them.

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20231101174325.10596-2-jack@suse.cz


Reviewed-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>