remove unnecessary dependency

Author: oesteban

nipype/interfaces/fsl/utils.py

@@ -17,7 +17,7 @@
     os.chdir(datadir)
 """
 from __future__ import print_function, division, unicode_literals, absolute_import
-from builtins import map, range, open
+from builtins import map, range
 
 import os
 import os.path as op