Fix unused import

# Rust tests and lints will be skipped. Delete if not intended.
[ci skip-rust]

# Building wheels and fs_util will be skipped. Delete if not intended.
[ci skip-build-wheels]

src/python/pants/testutil/pants_run_integration_test.py

@@ -3,7 +3,6 @@
 
 import glob
 import os
-import re
 import subprocess
 import sys
 import unittest