Update samples for async session changes and remove exp suffix from gemini model

PiperOrigin-RevId: 759364113

contributing/samples/fields_planner/main.py

@@ -41,7 +41,7 @@ async def main():
       artifact_service=artifact_service,
       session_service=session_service,
   )
-  session_11 = session_service.create_session(app_name, user_id_1)
+  session_11 = await session_service.create_session(app_name, user_id_1)
 
   async def run_prompt(session: Session, new_message: str):
     content = types.Content(
@@ -69,44 +69,5 @@ async def main():
   print('Total time:', end_time - start_time)
 
 
-def main_sync():
-  app_name = 'my_app'
-  user_id_1 = 'user1'
-  session_service = InMemorySessionService()
-  artifact_service = InMemoryArtifactService()
-  runner = Runner(
-      app_name=app_name,
-      agent=agent.root_agent,
-      artifact_service=artifact_service,
-      session_service=session_service,
-  )
-  session_11 = session_service.create_session(app_name, user_id_1)
-
-  def run_prompt(session: Session, new_message: str):
-    content = types.Content(
-        role='user', parts=[types.Part.from_text(text=new_message)]
-    )
-    print('** User says:', content.model_dump(exclude_none=True))
-    for event in runner.run_sync(
-        session=session,
-        new_message=content,
-    ):
-      if event.content.parts and event.content.parts[0].text:
-        print(f'** {event.author}: {event.content.parts[0].text}')
-
-  start_time = time.time()
-  print('Start time:', start_time)
-  print('------------------------------------')
-  run_prompt(session_11, 'Hi')
-  run_prompt(session_11, 'Roll a die.')
-  run_prompt(session_11, 'Roll a die again.')
-  run_prompt(session_11, 'What numbers did I got?')
-  end_time = time.time()
-  print('------------------------------------')
-  print('End time:', end_time)
-  print('Total time:', end_time - start_time)
-
-
 if __name__ == '__main__':
   asyncio.run(main())
-  main_sync()