dm thin metadata: remove unused dm_thin_remove_block and __remove

Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-thin-metadata.c

@@ -1665,22 +1665,6 @@ int dm_thin_insert_block(struct dm_thin_device *td, dm_block_t block,
 	return r;
 }
 
-static int __remove(struct dm_thin_device *td, dm_block_t block)
-{
-	int r;
-	struct dm_pool_metadata *pmd = td->pmd;
-	dm_block_t keys[2] = { td->id, block };
-
-	r = dm_btree_remove(&pmd->info, pmd->root, keys, &pmd->root);
-	if (r)
-		return r;
-
-	td->mapped_blocks--;
-	td->changed = true;
-
-	return 0;
-}
-
 static int __remove_range(struct dm_thin_device *td, dm_block_t begin, dm_block_t end)
 {
 	int r;
@@ -1740,18 +1724,6 @@ static int __remove_range(struct dm_thin_device *td, dm_block_t begin, dm_block_
 	return dm_btree_insert(&pmd->tl_info, pmd->root, keys, &value, &pmd->root);
 }
 
-int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block)
-{
-	int r = -EINVAL;
-
-	pmd_write_lock(td->pmd);
-	if (!td->pmd->fail_io)
-		r = __remove(td, block);
-	pmd_write_unlock(td->pmd);
-
-	return r;
-}
-
 int dm_thin_remove_range(struct dm_thin_device *td,
 			 dm_block_t begin, dm_block_t end)
 {

drivers/md/dm-thin-metadata.h

@@ -166,7 +166,6 @@ int dm_pool_alloc_data_block(struct dm_pool_metadata *pmd, dm_block_t *result);
 int dm_thin_insert_block(struct dm_thin_device *td, dm_block_t block,
 			 dm_block_t data_block);
 
-int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block);
 int dm_thin_remove_range(struct dm_thin_device *td,
 			 dm_block_t begin, dm_block_t end);