Remove dev server

package.json

@@ -7,7 +7,6 @@
     "serve": "vite preview"
   },
   "dependencies": {
-    "buffer": "^6.0.3",
     "events": "^3.3.0",
     "matrix-js-sdk": "^12.0.1",
     "react": "^17.0.0",
@@ -16,8 +15,6 @@
   },
   "devDependencies": {
     "@vitejs/plugin-react-refresh": "^1.3.1",
-    "express": "^4.17.1",
-    "http2-proxy": "^5.0.53",
     "vite": "^2.4.2"
   }
 }