Pushes

public/app/features/dashboard-scene/scene/layout-default/DefaultGridLayoutManager.tsx

@@ -16,7 +16,6 @@ import {
   useSceneObjectState,
   SceneObject,
   SceneGridLayoutDragStartEvent,
-  SceneGridPlaceholderItem,
 } from '@grafana/scenes';
 import { Spec as DashboardV2Spec } from '@grafana/schema/dist/esm/schema/dashboard/v2';
 import { useStyles2 } from '@grafana/ui';
@@ -370,8 +369,7 @@ export class DefaultGridLayoutManager
     this.state.grid.forEachChild((child) => {
       if (
         !(child instanceof DashboardGridItem) &&
-        !(child instanceof SceneGridRow) &&
-        !(child instanceof SceneGridPlaceholderItem)
+        !(child instanceof SceneGridRow)
       ) {
         throw new Error('Child is not a DashboardGridItem or SceneGridRow, invalid scene');
       }

public/app/features/dashboard-scene/scene/layout-rows/RowsLayoutManager.tsx

@@ -2,7 +2,6 @@ import { t } from '@grafana/i18n';
 import {
   sceneGraph,
   SceneGridItemLike,
-  SceneGridPlaceholderItem,
   SceneGridRow,
   SceneObject,
   SceneObjectBase,
@@ -315,7 +314,7 @@ export class RowsLayoutManager extends SceneObjectBase<RowsLayoutManagerState> i
       let children: SceneGridItemLike[] | undefined;
 
       layout.state.grid.forEachChild((child) => {
-        if (!(child instanceof DashboardGridItem) && !(child instanceof SceneGridRow) && !(child instanceof SceneGridPlaceholderItem)) {
+        if (!(child instanceof DashboardGridItem) && !(child instanceof SceneGridRow)) {
           throw new Error('Child is not a DashboardGridItem or SceneGridRow, invalid scene');
         }