Merge pull request #319 from pyca/alex-patch-1

Removed an unused import and fixed formatting
diff --git a/OpenSSL/test/util.py b/OpenSSL/test/util.py
index 78b4a3f..073aa6c 100644
--- a/OpenSSL/test/util.py
+++ b/OpenSSL/test/util.py
@@ -7,7 +7,6 @@
 U{Twisted<http://twistedmatrix.com/>}.
 """
 
-import os
 import shutil
 import sys
 import traceback
@@ -21,11 +20,7 @@
 from OpenSSL.crypto import Error
 
 
-try:
-    import memdbg
-except Exception:
-    class _memdbg(object): heap = None
-    memdbg = _memdbg()
+import memdbg
 
 from OpenSSL._util import ffi, lib, byte_string as b