diff --git a/src/black/comments.py b/src/black/comments.py
index 72b485f345f..226968bff98 100644
--- a/src/black/comments.py
+++ b/src/black/comments.py
@@ -1,5 +1,4 @@
 import re
-import sys
 from dataclasses import dataclass
 from functools import lru_cache
 from typing import Final, Iterator, List, Optional, Union