diff --git a/build_pop.py b/build_pop.py
index 8f30c202d2ee0dbed441c299795c0d11584eb0cb..cbf59303bfd9b233255ff2e668a970d5274a4aae 100755
--- a/build_pop.py
+++ b/build_pop.py
@@ -2,7 +2,6 @@
 
 import sys
 import os
-import re
 import random
 import argparse
 from collections import OrderedDict