bdev: Remove unused import of itertools

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>

lib/bdev.py

@@ -29,7 +29,6 @@ import stat
 import pyparsing as pyp
 import os
 import logging
-import itertools
 
 from ganeti import utils
 from ganeti import errors