remove unused import
diff --git a/OpenSSL/test/test_crypto.py b/OpenSSL/test/test_crypto.py
index c36a988..82b3d7d 100644
--- a/OpenSSL/test/test_crypto.py
+++ b/OpenSSL/test/test_crypto.py
@@ -10,7 +10,6 @@
 import base64
 import os
 import re
-import sys
 from subprocess import PIPE, Popen
 from datetime import datetime, timedelta