chore(core): remove unused bufferutil

Author: NathanFlurry

packages/rivetkit/package.json

@@ -188,8 +188,7 @@
     "tsx": "^4.19.4",
     "typescript": "^5.7.3",
     "vitest": "^3.1.1",
-    "ws": "^8.18.1",
-    "bufferutil": "^4.0.9"
+    "ws": "^8.18.1"
   },
   "peerDependencies": {
     "@hono/node-server": "^1.14.0",