refactor: brain memory

metagpt/provider/metagpt_llm_api.py

@@ -14,15 +14,3 @@ class MetaGPTLLMAPI(OpenAIGPTAPI):
 
     def __init__(self):
         super().__init__()
-
-    async def get_summary(self, memory, max_words=200, keep_language: bool = False, **kwargs) -> str:
-        """
-        Return string in the following format：
-        [
-            {"role": "system", "content": "You are a helpful assistant."},
-            {"role": "user", "content": "Knock knock."},
-            {"role": "assistant", "content": "Who's there?"},
-            {"role": "user", "content": "Orange."},
-        ]
-        """
-        return memory.dumps_raw_messages(max_length=max_words)