Remove unused zod dependency in simple-host

Author: fredericbarthelet

examples/simple-host/package.json

@@ -12,8 +12,7 @@
     "@modelcontextprotocol/ext-apps": "../..",
     "@modelcontextprotocol/sdk": "^1.22.0",
     "react": "^19.2.0",
-    "react-dom": "^19.2.0",
-    "zod": "^3.25.0"
+    "react-dom": "^19.2.0"
   },
   "devDependencies": {
     "@types/express": "^5.0.0",