diff --git a/contrib/devtools/clang-format-diff.py b/contrib/devtools/clang-format-diff.py
index ca1bd8854..5402870fb 100755
--- a/contrib/devtools/clang-format-diff.py
+++ b/contrib/devtools/clang-format-diff.py
@@ -71,7 +71,6 @@ import argparse
 import difflib
 import io
 import re
-import string
 import subprocess
 import sys