Update scene document versions and remove unused import

src/document/migrate-scene-document.ts

@@ -165,6 +165,7 @@ import {
   SCENE_TRANSITION_SEQUENCE_EFFECTS_SCENE_DOCUMENT_VERSION,
   SCHEDULER_CONTROL_EFFECTS_SCENE_DOCUMENT_VERSION,
   SPATIAL_AUDIO_SCENE_DOCUMENT_VERSION,
+  STARTER_PBR_MATERIAL_LIBRARY_SCENE_DOCUMENT_VERSION,
   PROJECT_NAME_SCENE_DOCUMENT_VERSION,
   NPC_COLLIDER_SCENE_DOCUMENT_VERSION,
   NPC_ENTITY_FOUNDATION_SCENE_DOCUMENT_VERSION,

src/runtime-three/runtime-host.ts

@@ -62,7 +62,6 @@ import {
   disposeStarterMaterialTextureSet,
   type StarterMaterialTextureSet
 } from "../materials/starter-material-textures";
-import type { MaterialDef } from "../materials/starter-material-library";
 import {
   applyAdvancedRenderingLightShadowFlags,
   applyAdvancedRenderingRenderableShadowFlags,