Update tools.py

tools.py

@@ -2,8 +2,6 @@ import pandas as pd
 from langchain_community.tools import DuckDuckGoSearchRun, TavilySearchResults
 from langchain_core.tools import tool
 from langchain.schema import HumanMessage, AIMessage, SystemMessage
-from langchain_openai import AzureChatOpenAI
-from azure.identity import EnvironmentCredential
 from langchain_google_genai import ChatGoogleGenerativeAI
 import base64