block: remove bio_last_bvec_all

There are no more callers of this function after commit f6b2d8b
("btrfs: track the next file offset in struct btrfs_bio_ctrl"), so
remove the function.

Signed-off-by: Keith Busch <[email protected]>
Reviewed-by: Kanchan Joshi <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

Author: keithbusch

Documentation/block/biovecs.rst

@@ -135,7 +135,6 @@ Usage of helpers:
 	bio_first_bvec_all()
 	bio_first_page_all()
 	bio_first_folio_all()
-	bio_last_bvec_all()
 
 * The following helpers iterate over single-page segment. The passed 'struct
   bio_vec' will contain a single-page IO vector during the iteration::

include/linux/bio.h

@@ -256,12 +256,6 @@ static inline struct folio *bio_first_folio_all(struct bio *bio)
 	return page_folio(bio_first_page_all(bio));
 }
 
-static inline struct bio_vec *bio_last_bvec_all(struct bio *bio)
-{
-	WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));
-	return &bio->bi_io_vec[bio->bi_vcnt - 1];
-}
-
 /**
  * struct folio_iter - State for iterating all folios in a bio.
  * @folio: The current folio we're iterating.  NULL after the last folio.