Update app.py

app.py

@@ -24,7 +24,7 @@ import requests
 # LangChain & LangGraph
 from langgraph.graph.message import add_messages
 from langchain_core.messages import HumanMessage, AIMessage, ToolMessage, SystemMessage, AnyMessage, ToolCall
-from langchain_core.tools import tool, ToolCall
+from langchain_core.tools import tool
 from langgraph.prebuilt import ToolNode
 from langgraph.graph import START, END, StateGraph
 from langchain_groq import ChatGroq