diff --git a/block.c b/block.c
index 54bc1c3b2d..e79fe6e07e 100644
--- a/block.c
+++ b/block.c
@@ -2517,25 +2517,6 @@ static void bdrv_default_perms_for_storage(BlockDriverState *bs, BdrvChild *c,
     *nshared = shared;
 }
 
-void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
-                               const BdrvChildClass *child_class,
-                               BdrvChildRole role,
-                               BlockReopenQueue *reopen_queue,
-                               uint64_t perm, uint64_t shared,
-                               uint64_t *nperm, uint64_t *nshared)
-{
-    if (child_class == &child_of_bds) {
-        bdrv_default_perms(bs, c, child_class, role, reopen_queue,
-                           perm, shared, nperm, nshared);
-        return;
-    }
-
-    assert(child_class == &child_file);
-
-    bdrv_default_perms_for_storage(bs, c, child_class, role, reopen_queue,
-                                   perm, shared, nperm, nshared);
-}
-
 void bdrv_default_perms(BlockDriverState *bs, BdrvChild *c,
                         const BdrvChildClass *child_class, BdrvChildRole role,
                         BlockReopenQueue *reopen_queue,
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 6fc5f0d333..e791c40496 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -1262,17 +1262,6 @@ int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
  */
 int bdrv_child_refresh_perms(BlockDriverState *bs, BdrvChild *c, Error **errp);
 
-/* Default implementation for BlockDriver.bdrv_child_perm() that can be used by
- * (non-raw) image formats: Like above for bs->backing, but for bs->file it
- * requires WRITE | RESIZE for read-write images, always requires
- * CONSISTENT_READ and doesn't share WRITE. */
-void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
-                               const BdrvChildClass *child_class,
-                               BdrvChildRole child_role,
-                               BlockReopenQueue *reopen_queue,
-                               uint64_t perm, uint64_t shared,
-                               uint64_t *nperm, uint64_t *nshared);
-
 bool bdrv_recurse_can_replace(BlockDriverState *bs,
                               BlockDriverState *to_replace);