remove watchdog timers and specific asyncio implementations

Watchdog timers have been removed. They were introduced in 0.0.72 to help
diagnose pipeline freezes. Unfortunately, they proved ineffective since they
required developers to use Pipecat-specific queues, iterators, and events to
correctly reset the timer, which limited their usefulness and added friction.

src/pipecat/services/gemini_multimodal_live/gemini.py

@@ -67,7 +67,6 @@ from pipecat.services.openai.llm import (
     OpenAIUserContextAggregator,
 )
 from pipecat.transcriptions.language import Language
-from pipecat.utils.asyncio.watchdog_async_iterator import WatchdogAsyncIterator
 from pipecat.utils.string import match_endofsentence
 from pipecat.utils.time import time_now_iso8601
 from pipecat.utils.tracing.service_decorators import traced_gemini_live, traced_stt
@@ -929,7 +928,7 @@ class GeminiMultimodalLiveLLMService(LLMService):
 
     async def _receive_task_handler(self):
         """Handle incoming messages from the WebSocket connection."""
-        async for message in WatchdogAsyncIterator(self._websocket, manager=self.task_manager):
+        async for message in self._websocket:
             evt = events.parse_server_event(message)
             # logger.debug(f"Received event: {message[:500]}")
             # logger.debug(f"Received event: {evt}")