chore: Improve comments

Author: anubhav756

packages/toolbox-adk/src/toolbox_adk/tool.py

@@ -46,7 +46,6 @@
 def _patched_update_credential_with_tokens(auth_credential, tokens):
     _orig_update_cred(auth_credential, tokens)
     if tokens and "id_token" in tokens and auth_credential and auth_credential.oauth2:
-        # Pydantic's `extra="allow"` config preserves this dynamically set attribute
         setattr(auth_credential.oauth2, "id_token", tokens["id_token"])
 
 oauth2_credential_util.update_credential_with_tokens = _patched_update_credential_with_tokens