Update main.py

main.py

@@ -4,7 +4,7 @@ import sys
 import time
 import logging
 from pipecat.frames.frames import (
-    TextFrame, AudioFrame, CallEndEvent, UserStartedSpeakingFrame,
+    TextFrame, CallEndEvent, UserStartedSpeakingFrame,
     UserStoppedSpeakingFrame, LLMResponseStartFrame, LLMResponseEndFrame,
     TTSStartedFrame, TTSEndFrame
 )