Remove unused re import from create_installer_archive.py

In crrev.com/c/1450414 I removed the last usage of re. This removes the
import, for cleanliness.

Change-Id: Ibf18551aeb048ee889d6db093a66d9f4cbf47d84
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1591665
Commit-Queue: Greg Thompson <grt@chromium.org>
Auto-Submit: Bruce Dawson <brucedawson@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658475}

chrome/tools/build/win/create_installer_archive.py

@@ -17,7 +17,6 @@ import fnmatch
 import glob
 import optparse
 import os
-import re
 import shutil
 import subprocess
 import sys