contrib: Remove unused import string

MarcoFalke · MarcoFalke · commit 05120ee755f0 · 2018-03-28T14:35:28.000-04:00
diff --git a/contrib/devtools/clang-format-diff.py b/contrib/devtools/clang-format-diff.py
@@ -71,7 +71,6 @@
 import difflib
 import io
 import re
-import string
 import subprocess
 import sys
 
