Remove old import that shaded langchain

agents.py

@@ -6,7 +6,7 @@ from langgraph.prebuilt import tools_condition
 from langgraph.prebuilt import ToolNode
 from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_groq import ChatGroq
-from langchain.llms import RWKV
+from langchain_community.llms import RWKV
 from langchain_huggingface import ChatHuggingFace, HuggingFaceEndpoint, HuggingFaceEmbeddings
 from langchain_community.tools.tavily_search import TavilySearchResults
 from langchain_community.document_loaders import WikipediaLoader
@@ -16,14 +16,6 @@ from langchain_core.messages import SystemMessage, HumanMessage
 from langchain_core.tools import tool
 from huggingface_hub import hf_hub_download
 
-# RWKV setup flags — must come before importing RWKV
-os.environ["RWKV_JIT_ON"]   = "1"
-os.environ["RWKV_V7_ON"]    = "1"   # enable RWKV-7
-os.environ["RWKV_CUDA_ON"]  = "0"   # set to "1"
-
-from rwkv.model import RWKV
-from rwkv.utils import PIPELINE
-
 load_dotenv()
 
 class BasicAgent: