Update y_finance.py

Delete import request

tradingagents/dataflows/y_finance.py

@@ -3,7 +3,6 @@ from datetime import datetime
 from dateutil.relativedelta import relativedelta
 import time
 from yfinance.exceptions import YFRateLimitError
-import requests
 import yfinance as yf
 import os
 from .stockstats_utils import StockstatsUtils
@@ -514,4 +513,4 @@ def get_insider_transactions(
         return header + csv_string
         
     except Exception as e:
-        return f"Error retrieving insider transactions for {ticker}: {str(e)}"
+        return f"Error retrieving insider transactions for {ticker}: {str(e)}"