Update app.py

app.py

@@ -81,7 +81,7 @@ class GeminiHandler(AsyncAudioVideoStreamHandler):
     
         if self.session is None:
             client = genai.Client(api_key=api_key, http_options={"api_version": "v1alpha"})
-            config = {"response_modalities": ["AUDIO"], "system_instruction": "Be helpful."}
+            config = {"response_modalities": ["AUDIO"]}
             async with client.aio.live.connect(
                 model="gemini-2.0-flash-exp", config=config
             ) as session: