nit linter

backend/app.py

@@ -2,21 +2,19 @@ import json
 import logging
 import mimetypes
 import os
-import typing as tp
-from io import StringIO
 from urllib.parse import unquote
 
-import pandas as pd
 import requests
-from flask import Flask, Response, request, send_from_directory
-from flask_cors import CORS
-from tools import (get_leaderboard_filters,  # Import your function
-                   get_old_format_dataframe)
 
+import pandas as pd
 from backend.config import ABS_DATASET_DOMAIN, get_dataset_config, get_datasets
 from backend.descriptions import (DATASET_DESCRIPTIONS, DESCRIPTIONS,
                                   METRIC_DESCRIPTIONS, MODEL_DESCRIPTIONS)
 from backend.examples import get_examples_tab
+from flask import Flask, Response, request, send_from_directory
+from flask_cors import CORS
+from tools import get_leaderboard_filters  # Import your function
+from tools import get_old_format_dataframe
 
 logger = logging.getLogger(__name__)
 if not logger.hasHandlers():