remove message since error message won't show in cmd but vbs terminal

src/promptflow/promptflow/_sdk/_service/entry.py

@@ -128,7 +128,6 @@ def validate_port(port, force_start):
             app.logger.setLevel(logging.INFO)
         message = f"Start Prompt Flow Service on {port}, version: {get_promptflow_sdk_version()}"
         app.logger.info(message)
-        print(f"{message}. You're feel free to input CTRL+C or close the terminal to exit.")
         waitress.serve(app, host="127.0.0.1", port=port, threads=PF_SERVICE_WORKER_NUM)
     else:
         # Start a pfs process using detach mode. It will start a new process and create a new app. So we use environment