diff --git a/installer/slave/post_reboot.py b/installer/slave/post_reboot.py
index 2aef7e3..c549a37 100644
--- a/installer/slave/post_reboot.py
+++ b/installer/slave/post_reboot.py
@@ -1,5 +1,4 @@
 import os, sys, subprocess
-from StringIO import StringIO
 
 BOLD_START = '\033[1m'
 BOLD_END = '\033[0m'