Chat stream using default fetch' not node-fetch' in obsidian plugin

Plugins using NodeJS libraries like `node-fetch' don't work on
Obsidian mobile

src/interface/obsidian/package.json

@@ -25,9 +25,5 @@
         "obsidian": "latest",
         "tslib": "2.4.0",
         "typescript": "4.7.4"
-    },
-    "dependencies": {
-        "@types/node-fetch": "^2.6.4",
-        "node-fetch": "^3.1.0"
     }
 }