Removing unneeded from __future__ import statements.

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

ebook_converter/ebooks/mobi/reader/mobi8.py

@@ -1,11 +1,3 @@
-#!/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__ = '2012, Kovid Goyal <kovid@kovidgoyal.net>'
-__docformat__ = 'restructuredtext en'
-
 import struct, re, os
 from collections import namedtuple
 from itertools import repeat
@@ -26,6 +18,11 @@ from ebook_converter.ebooks.oeb.base import XPath, XHTML, xml2text
 from ebook_converter.polyglot.builtins import range, zip, unicode_type, getcwd, as_unicode
 from ebook_converter.polyglot.urllib import urldefrag
 
+
+__license__   = 'GPL v3'
+__copyright__ = '2012, Kovid Goyal <kovid@kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
 Part = namedtuple('Part',
     'num type filename start end aid')