Deletion of entity that has children doesn't work correctly

[AN-DCL]

1. Create two empty entities A and B.
2. Add a Transform and GltfContainer to both.
3. Set GltfContainer's asset to test-glb.glb in both entities.
4. Set entity A's position to (5, 0, 0).
5. Parent entity A to entity B (i.e. A is a child of B).
6. Delete entity B.

Result: model of entity B is still present in the renderer.