clean up

Former-commit-id: 43b77d77d57115dc0e40043577d67405a6787658

swarms/agents/utils/manager.py

@@ -3,7 +3,7 @@ from typing import Dict, Optional
 
 from langchain.agents.agent import AgentExecutor
 from langchain.callbacks.manager import CallbackManager
-from langchain.callbacks.base import set_handler
+# from langchain.callbacks.base import set_handler
 from langchain.chains.conversation.memory import ConversationBufferMemory
 from langchain.memory.chat_memory import BaseChatMemory
 
@@ -13,7 +13,7 @@ from .builder import AgentBuilder
 from .callback import EVALCallbackHandler, ExecutionTracingCallbackHandler
 
 
-set_handler(EVALCallbackHandler())
+CallbackManager.set_handler(EVALCallbackHandler())
 
 
 class AgentManager: