style: no more error on ruff linter

crossfit_booker.py

@@ -1,11 +1,10 @@
 # Native modules
-import json
 import logging
-from datetime import datetime, timedelta
+import traceback
 import os
-import sys
 import time
 import difflib
+from datetime import datetime, timedelta, date
 
 # Third-party modules
 import requests
@@ -13,7 +12,7 @@ from dateutil.parser import parse
 import pytz
 from dotenv import load_dotenv
 from urllib.parse import urlencode
-from typing import List, Dict, Optional, Any
+from typing import List, Dict, Optional, Any, Tuple
 
 # Import the SessionNotifier class
 from session_notifier import SessionNotifier