Removing unneeded from __future__ import statements.

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

ebook_converter/tinycss/tests/css21.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__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
-
 import io
 import os
 import tempfile
@@ -13,6 +6,11 @@ from tinycss.css21 import CSS21Parser
 from tinycss.tests.tokenizing import jsonify
 from tinycss.tests import BaseTest
 
+
+__license__ = 'GPL v3'
+__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
+
+
 class CoreParser(CSS21Parser):
     """A parser that always accepts unparsed at-rules."""
     def parse_at_rule(self, rule, stylesheet_rules, errors, context):