choose_boundary():  This no longer uses random, so stop importing it.
diff --git a/Lib/mimetools.py b/Lib/mimetools.py
index 67623ec..067a2cd 100644
--- a/Lib/mimetools.py
+++ b/Lib/mimetools.py
@@ -125,7 +125,6 @@
 
     global _prefix
     import time
-    import random
     if _prefix is None:
         import socket
         hostid = socket.gethostbyname(socket.gethostname())