diff --git a/layers/building/building.sql b/layers/building/building.sql
index 0f5509867..cbacc68a2 100644
--- a/layers/building/building.sql
+++ b/layers/building/building.sql
@@ -81,19 +81,6 @@ SELECT geometry,
            END) AS colour,
        CASE WHEN hide_3d THEN TRUE END AS hide_3d
 FROM (
-         SELECT
-             -- etldoc: osm_building_block_gen1 -> layer_building:z13
-             osm_id,
-             geometry,
-             NULL::int AS render_height,
-             NULL::int AS render_min_height,
-             NULL::text AS material,
-             NULL::text AS colour,
-             FALSE AS hide_3d
-         FROM osm_building_block_gen1
-         WHERE zoom_level = 13
-           AND geometry && bbox
-         UNION ALL
          SELECT
                                   -- etldoc: osm_building_polygon -> layer_building:z14_
              DISTINCT ON (osm_id) osm_id,
diff --git a/layers/building/building.yaml b/layers/building/building.yaml
index ea2bc6786..7f258b5a1 100644
--- a/layers/building/building.yaml
+++ b/layers/building/building.yaml
@@ -20,7 +20,6 @@ layer:
     hide_3d: |
         If True, building (part) should not be rendered in 3D. Currently, [building outlines](https://wiki.openstreetmap.org/wiki/Simple_3D_buildings) are marked as hide_3d.
 schema:
-  - ./update_building.sql
   - ./building.sql
 datasources:
   - type: imposm3