dm: Remove unused dm_table_bio_based

dm_table_bio_based() is unused since commit
29dec90a0f1d ("dm: fix bio_set allocation")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <[e-mail]>
Signed-off-by: Mikulas Patocka <[e-mail]>

drivers/md/dm-table.c

···
 	return NULL;
 }
 
-bool dm_table_bio_based(struct dm_table *t)
-{
-	return __table_type_bio_based(dm_table_get_type(t));
-}
-
 bool dm_table_request_based(struct dm_table *t)
 {
 	return __table_type_request_based(dm_table_get_type(t));

drivers/md/dm.h

···
 struct target_type *dm_table_get_immutable_target_type(struct dm_table *t);
 struct dm_target *dm_table_get_immutable_target(struct dm_table *t);
 struct dm_target *dm_table_get_wildcard_target(struct dm_table *t);
-bool dm_table_bio_based(struct dm_table *t);
 bool dm_table_request_based(struct dm_table *t);
 
 void dm_lock_md_type(struct mapped_device *md);