examples: remove vad_audio_passthrough=True

examples/phone-chatbot/voicemail_detection.py

@@ -168,7 +168,6 @@ async def main(
             camera_out_enabled=False,
             vad_enabled=True,
             vad_analyzer=SileroVADAnalyzer(),
-            vad_audio_passthrough=True,  # Important for audio collection
         ),
     )
 
@@ -244,7 +243,7 @@ async def main(
         If it sounds like a human (saying hello, asking questions, etc.), call the function switch_to_human_conversation.
 
         DO NOT say anything until you've determined if this is a voicemail or human.
-        
+
         If you are asked to terminate the call, **IMMEDIATELY** call the `terminate_call` function. **FAILURE TO CALL `terminate_call` IMMEDIATELY IS A MISTAKE.**"""
 
     # Initialize voicemail detection LLM