Removing unneeded from __future__ import statements.

Since we are on Python 3.6 and up, we don't need those anymore.

ebook_converter/ebooks/oeb/transforms/metadata.py

@@ -1,17 +1,14 @@
-#!/usr/bin/env python2
-# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
-from __future__ import absolute_import, division, print_function, unicode_literals
-
-__license__   = 'GPL v3'
-__copyright__ = '2009, Kovid Goyal <kovid@kovidgoyal.net>'
-__docformat__ = 'restructuredtext en'
-
 import os, re
 from ebook_converter.utils.date import isoformat, now
 from ebook_converter import guess_type
 from ebook_converter.polyglot.builtins import iteritems
 
 
+__license__   = 'GPL v3'
+__copyright__ = '2009, Kovid Goyal <kovid@kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
+
 def meta_info_to_oeb_metadata(mi, m, log, override_input_metadata=False):
     from ebook_converter.ebooks.oeb.base import OPF
     if not mi.is_null('title'):