Removed old imports used for python 2

src/sessions/__init__.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 """ this package contains code related to Sessions.
 In TWBlue, a session module defines everything a social network needs to be used in the program."""
-from __future__ import unicode_literals
 # let's define a global object for storing sessions across the program.
 sessions = {}

src/sessions/mastodon/session.py

@@ -4,12 +4,12 @@ import paths
 import time
 import logging
 import wx
+import mastodon
 import config
 import config_utils
 import output
 import application
 from pubsub import pub
-import mastodon
 from mysc.thread_utils import call_threaded
 from sessions import base
 from .wxUI import authorisationDialog

src/sessions/twitter/wxUI.py

@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import wx
 
 class authorisationDialog(wx.Dialog):