Removing unneeded from __future__ import statements.

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

ebook_converter/ebooks/metadata/book/__init__.py

@@ -1,16 +1,9 @@
-#!/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__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-'''
-All fields must have a NULL value represented as None for simple types,
-an empty list/dictionary for complex types and (None, None) for cover_data
-'''
-
+# All fields must have a NULL value represented as None for simple types,
+# an empty list/dictionary for complex types and (None, None) for cover_data
 SOCIAL_METADATA_FIELDS = frozenset((
     'tags',             # Ordered list
     'rating',           # A floating point number between 0 and 10
@@ -22,10 +15,7 @@ SOCIAL_METADATA_FIELDS = frozenset((
     'identifiers',
 ))
 
-'''
-The list of names that convert to identifiers when in get and set.
-'''
-
+# The list of names that convert to identifiers when in get and set.
 TOP_LEVEL_IDENTIFIERS = frozenset((
     'isbn',
 ))
@@ -128,5 +118,5 @@ SERIALIZABLE_FIELDS =      SOCIAL_METADATA_FIELDS.union(
                            CALIBRE_METADATA_FIELDS).union(
                            DEVICE_METADATA_FIELDS) - \
                            frozenset(('device_collections', 'formats',
-                               'cover_data'))
+                                      'cover_data'))
 # these are rebuilt when needed

ebook_converter/ebooks/metadata/book/base.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__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
-__docformat__ = 'restructuredtext en'
-
 import copy, traceback
 
 from ebook_converter import prints
@@ -17,6 +9,11 @@ from ebook_converter.library.field_metadata import FieldMetadata
 from ebook_converter.utils.icu import sort_key
 from ebook_converter.polyglot.builtins import iteritems, unicode_type, filter, map
 
+
+__license__   = 'GPL v3'
+__copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
 # Special sets used to optimize the performance of getting and setting
 # attributes on Metadata objects
 SIMPLE_GET = frozenset(STANDARD_METADATA_FIELDS - TOP_LEVEL_IDENTIFIERS)

ebook_converter/ebooks/metadata/book/formatter.py

@@ -1,15 +1,12 @@
-#!/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>'
-
 from ebook_converter.ebooks.metadata.book import TOP_LEVEL_IDENTIFIERS, ALL_METADATA_FIELDS
 
 from ebook_converter.utils.formatter import TemplateFormatter
 
 
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+
 class SafeFormat(TemplateFormatter):
 
     def __init__(self):

ebook_converter/ebooks/metadata/book/json_codec.py

@@ -1,11 +1,8 @@
-from __future__ import absolute_import, division, print_function, unicode_literals
-
-'''
+"""
 Created on 4 Jun 2010
 
 @author: charles
-'''
-
+"""
 import json, traceback
 from datetime import datetime, time
 
@@ -16,6 +13,7 @@ from ebook_converter import isbytestring
 from ebook_converter.polyglot.builtins import iteritems, itervalues, as_bytes
 from ebook_converter.polyglot.binary import as_base64_unicode, from_base64_bytes
 
+
 # Translate datetimes to and from strings. The string form is the datetime in
 # UTC. The returned date is also UTC