examples: use Cartesia TTS in most examples

examples/foundational/05-sync-speech-and-image.py

@@ -13,7 +13,6 @@ from dataclasses import dataclass
 
 from pipecat.frames.frames import (
     AppFrame,
-    EndFrame,
     Frame,
     ImageRawFrame,
     LLMFullResponseStartFrame,
@@ -152,8 +151,6 @@ async def main():
             frames.append(MonthFrame(month=month))
             frames.append(LLMMessagesFrame(messages))
 
-        frames.append(EndFrame())
-
         runner = PipelineRunner()
 
         task = PipelineTask(pipeline)