Removing unneeded from __future__ import statements.

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

ebook_converter/ebooks/docx/writer/from_html.py

@@ -1,10 +1,3 @@
-#!/usr/bin/env python2
-# vim:fileencoding=utf-8
-from __future__ import absolute_import, division, print_function, unicode_literals
-
-__license__ = 'GPL v3'
-__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
-
 import re
 from collections import Counter
 
@@ -21,6 +14,10 @@ from ebook_converter.utils.localization import lang_as_iso639_1
 from ebook_converter.polyglot.builtins import unicode_type, string_or_bytes
 
 
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+
 def lang_for_tag(tag):
     for attr in ('lang', '{http://www.w3.org/XML/1998/namespace}lang'):
         val = lang_as_iso639_1(tag.get(attr))