diff --git a/src/calibre/db/annotations.py b/src/calibre/db/annotations.py
index 6a347e70c2..e0c912743f 100644
--- a/src/calibre/db/annotations.py
+++ b/src/calibre/db/annotations.py
@@ -2,8 +2,6 @@
 # vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
 
-from __future__ import absolute_import, division, print_function, unicode_literals
-
 from collections import defaultdict
 from itertools import chain
 from operator import itemgetter
diff --git a/src/calibre/gui2/library/annotations.py b/src/calibre/gui2/library/annotations.py
index 886af6813d..83777ef601 100644
--- a/src/calibre/gui2/library/annotations.py
+++ b/src/calibre/gui2/library/annotations.py
@@ -2,8 +2,6 @@
 # vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
 
-from __future__ import absolute_import, division, print_function, unicode_literals
-
 import os
 from textwrap import fill
 
diff --git a/src/calibre/gui2/viewer/config.py b/src/calibre/gui2/viewer/config.py
index ec801591ad..d11d935e2b 100644
--- a/src/calibre/gui2/viewer/config.py
+++ b/src/calibre/gui2/viewer/config.py
@@ -2,8 +2,6 @@
 # vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
 
-from __future__ import absolute_import, division, print_function, unicode_literals
-
 import os
 from calibre.constants import config_dir
 from calibre.utils.config import JSONConfig
diff --git a/src/calibre/gui2/viewer/widgets.py b/src/calibre/gui2/viewer/widgets.py
index 8de34d0d80..67da85c03c 100644
--- a/src/calibre/gui2/viewer/widgets.py
+++ b/src/calibre/gui2/viewer/widgets.py
@@ -2,8 +2,6 @@
 # vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
 
-from __future__ import absolute_import, division, print_function, unicode_literals
-
 import re
 
 from PyQt5.Qt import (