diff --git a/tools/pipstrap.py b/tools/pipstrap.py
index 06f045fa1..7370756fa 100755
--- a/tools/pipstrap.py
+++ b/tools/pipstrap.py
@@ -1,10 +1,7 @@
 #!/usr/bin/env python
 """Uses pip to upgrade Python packaging tools to pinned versions."""
 from __future__ import absolute_import
-
 import os
-import shutil
-import tempfile
 
 import pip_install