TS: Clean up

src/loaders/Loader.d.ts

@@ -21,6 +21,4 @@ export class Loader {
 	setPath( path: string ): this;
 	setResourcePath( resourcePath: string ): this;
 
-	static Handlers: LoaderHandler;
-
 }

src/loaders/LoadingManager.d.ts

@@ -1,3 +1,5 @@
+import { Loader } from './Loader';
+
 export const DefaultLoadingManager: LoadingManager;
 
 /**