From 1167d6e39e5a7fcc82a0e2d732cb9cc881c3c055 Mon Sep 17 00:00:00 2001
From: "2569718930@qq.com" <2569718930@qq.com>
Date: Sat, 2 May 2026 12:32:12 +0800
Subject: [PATCH] Keep lint checks passing after backtest cleanup

The backtest script carried stale imports that made ruff fail even though runtime behavior did not depend on them. Removing the unused imports keeps CI lint checks green without changing script logic.

Confidence: high
Scope-risk: narrow
Reversibility: clean
Tested: python -m ruff check .
Not-tested: full application test suite
---
 scripts/backtest_metar_calibrated_path.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/scripts/backtest_metar_calibrated_path.py b/scripts/backtest_metar_calibrated_path.py
index d388c9a5..e58f17f3 100644
--- a/scripts/backtest_metar_calibrated_path.py
+++ b/scripts/backtest_metar_calibrated_path.py
@@ -21,12 +21,11 @@ import argparse
 import csv
 import json
 import math
-import os
 import sqlite3
 import statistics
 import sys
 from dataclasses import dataclass
-from datetime import datetime, timedelta
+from datetime import datetime
 from pathlib import Path
 from typing import Any, Iterable