🔥 refactor(nodes.py): remove unused import of deepcopy

🔥 refactor(custom_lists.py): remove unused import of vectorstores
The import of deepcopy in nodes.py and vectorstores in custom_lists.py are not used in the codebase and can be safely removed to improve code readability and maintainability.

src/backend/langflow/graph/nodes.py

@@ -1,4 +1,3 @@
-from copy import deepcopy
 from typing import Any, Dict, List, Optional, Union
 
 from langflow.graph.base import Node

src/backend/langflow/interface/custom_lists.py

@@ -10,7 +10,6 @@ from langchain import (
     requests,
     text_splitter,
     utilities,
-    vectorstores,
 )
 from langchain.agents import agent_toolkits
 from langchain.chat_models import ChatOpenAI