Revert "Use npm to manage litegraph dependency (#45)" (#47)

This reverts commit 4640eaf0ac.

src/extensions/core/simpleTouchSupport.ts

@@ -1,5 +1,4 @@
 import { app } from "../../scripts/app";
-import { LGraphCanvas, LiteGraph } from "comfyui-litegraph";
 
 let touchZooming;
 let touchCount = 0;