'Remove all specified attributes from a list of subjects.
Args:
subjects: The list of subjects that will have these attributes removed.
attributes: A list of attributes.
start: A timestamp, attributes older than start will not be deleted.
end: A timestamp, attributes newer than end will not be deleted.
sync: If true we block until the operation completes.
token: An ACL token.'

def MultiDeleteAttributes(self, subjects, attributes, start=None, end=None, sync=True, token=None):

    for subject in subjects:
        self.DeleteAttributes(subject, attributes, start=start, end=end, sync=sync, token=token)
