Refa:replace trio with asyncio (#11831)

### What problem does this PR solve?

change:
replace trio with asyncio

### Type of change
- [x] Refactoring

graphrag/general/graph_extractor.py

@@ -5,11 +5,11 @@ Reference:
  - [graphrag](https://github.com/microsoft/graphrag)
 """
 
+import asyncio
 import re
 from typing import Any
 from dataclasses import dataclass
 import tiktoken
-import trio
 
 from graphrag.general.extractor import Extractor, ENTITY_EXTRACTION_MAX_GLEANINGS
 from graphrag.general.graph_prompt import GRAPH_EXTRACTION_PROMPT, CONTINUE_PROMPT, LOOP_PROMPT
@@ -107,7 +107,7 @@ class GraphExtractor(Extractor):
         }
         hint_prompt = perform_variable_replacements(self._extraction_prompt, variables=variables)
         async with chat_limiter:
-            response = await trio.to_thread.run_sync(self._chat, hint_prompt, [{"role": "user", "content": "Output:"}], {}, task_id)
+            response = await asyncio.to_thread(self._chat,hint_prompt,[{"role": "user", "content": "Output:"}],{},task_id)
         token_count += num_tokens_from_string(hint_prompt + response)
 
         results = response or ""
@@ -117,7 +117,7 @@ class GraphExtractor(Extractor):
         for i in range(self._max_gleanings):
             history.append({"role": "user", "content": CONTINUE_PROMPT})
             async with chat_limiter:
-                response = await trio.to_thread.run_sync(lambda: self._chat("", history, {}))
+                response = await asyncio.to_thread(self._chat, "", history, {})
             token_count += num_tokens_from_string("\n".join([m["content"] for m in history]) + response)
             results += response or ""
 
@@ -127,7 +127,7 @@ class GraphExtractor(Extractor):
             history.append({"role": "assistant", "content": response})
             history.append({"role": "user", "content": LOOP_PROMPT})
             async with chat_limiter:
-                continuation = await trio.to_thread.run_sync(lambda: self._chat("", history))
+                continuation = await asyncio.to_thread(self._chat, "", history)
             token_count += num_tokens_from_string("\n".join([m["content"] for m in history]) + response)
             if continuation != "Y":
                 break