[d-feet/enable-gitlab-ci: 4/6] Fix a few unused variable/import warnings

[Will Thompson <wjt src gnome org>]

commit 9664bdf9f56841d9f97c4fe614748224cefe08e1
Author: Will Thompson <will willthompson co uk>
Date:   Wed Sep 19 11:06:26 2018 +0100

    Fix a few unused variable/import warnings
    
    These were all reported by flake8.

 src/dfeet/addconnectiondialog.py | 2 +-
 src/dfeet/bus_watch.py           | 1 -
 src/dfeet/dbus_utils.py          | 1 -
 src/dfeet/window.py              | 1 -
 4 files changed, 1 insertion(+), 4 deletions(-)
---
diff --git a/src/dfeet/addconnectiondialog.py b/src/dfeet/addconnectiondialog.py
index 4953287..9624904 100644
--- a/src/dfeet/addconnectiondialog.py
+++ b/src/dfeet/addconnectiondialog.py
@@ -45,7 +45,7 @@ class AddConnectionDialog:
         elif response == Gtk.ResponseType.OK:
             # check if given address is valid
             try:
-                is_supported = Gio.dbus_is_supported_address(self.address)
+                Gio.dbus_is_supported_address(self.address)
             except Exception as e:
                 self.label_status.set_text(str(e))
                 self.run()
diff --git a/src/dfeet/bus_watch.py b/src/dfeet/bus_watch.py
index b8f5e5e..a6472ed 100644
--- a/src/dfeet/bus_watch.py
+++ b/src/dfeet/bus_watch.py
@@ -354,7 +354,6 @@ class BusWatch(object):
 
 if __name__ == "__main__":
     """for debugging"""
-    import sys
     import argparse
 
     parser = argparse.ArgumentParser(description='show a given bus address')
diff --git a/src/dfeet/dbus_utils.py b/src/dfeet/dbus_utils.py
index 163b658..4aa5fde 100644
--- a/src/dfeet/dbus_utils.py
+++ b/src/dfeet/dbus_utils.py
@@ -153,7 +153,6 @@ def type_list_to_string(type_list):
 
 def sig_to_markup(sig, span_attr_str):
     list_ = sig_to_type_list(sig)
-    markedup_list = []
     m = '<span ' + span_attr_str + '>'
     m += type_list_to_string(list_)
     m += '</span>'
diff --git a/src/dfeet/window.py b/src/dfeet/window.py
index b8f98eb..bfc08cc 100644
--- a/src/dfeet/window.py
+++ b/src/dfeet/window.py
@@ -27,7 +27,6 @@ from dfeet.bus_watch import BusWatch
 from dfeet.settings import Settings
 from dfeet.uiloader import UILoader
 from dfeet.addconnectiondialog import AddConnectionDialog
-from dfeet.executemethoddialog import ExecuteMethodDialog
 
 
 class DFeetWindow(Gtk.ApplicationWindow):