chore: fix outdated agents dependency in a2a example

Author: zebp

examples/a2a/package.json

@@ -5,7 +5,6 @@
   },
   "dependencies": {
     "@a2a-js/sdk": "^0.2.2",
-    "agents": "^0.0.98",
     "hono": "^4.8.3"
   },
   "devDependencies": {