Don't use the regex module

build.py

@@ -5,7 +5,7 @@ import gzip
 import json
 import os
 import glob
-import regex as re
+import re
 import shutil
 import sys
 

requirements.txt

@@ -1,3 +1,2 @@
 http://closure-linter.googlecode.com/files/closure_linter-latest.tar.gz
 pystache
-regex