Update main.py

main.py

@@ -4,9 +4,8 @@ import sys
 import time
 import logging
 from pipecat.frames.frames import (
-    TextFrame, CallEndEvent, UserStartedSpeakingFrame,
-    UserStoppedSpeakingFrame, LLMResponseStartFrame, LLMResponseEndFrame,
-    TTSStartedFrame, TTSEndFrame
+    TextFrame, UserStartedSpeakingFrame, UserStoppedSpeakingFrame,
+    LLMResponseStartFrame, LLMResponseEndFrame, TTSStartedFrame, TTSEndFrame
 )
 from pipecat.pipeline.pipeline import Pipeline
 from pipecat.pipeline.runner import PipelineRunner