remove unused threadpool references

ios/src/FilamentViewer.cpp

@@ -193,8 +193,7 @@ FilamentViewer::FilamentViewer(void *layer, LoadResource loadResource,
                                    _resourceLoader,
                                    _ncm, 
                                    _engine,
-                                   _scene,
-                                   tp);
+                                   _scene);
 }
 
 static constexpr float4 sFullScreenTriangleVertices[3] = {

ios/src/SceneAssetLoader.hpp

@@ -24,8 +24,7 @@ namespace polyvox {
                 ResourceLoader* resourceLoader,
                 NameComponentManager* ncm,
                 Engine* engine,
-                Scene* scene,
-                workqueue::threadpool& threadpool);
+                Scene* scene);
             SceneAsset* fromGltf(const char* uri, const char* relativeResourcePath);
             SceneAsset* fromGlb(const char* uri);
             void remove(SceneAsset* asset);
@@ -38,8 +37,6 @@ namespace polyvox {
             NameComponentManager* _ncm;
             Scene* _scene;
             Engine* _engine;
-            workqueue::threadpool& _threadpool;
-
 
     };
 }