examples: remove unused imports from python examples

examples/python/dbus/get-active-connection-uuids.py

@@ -4,7 +4,7 @@
 # Copyright (C) 2010 Red Hat, Inc.
 #
 
-import dbus, sys
+import dbus
 
 # This example takes a device interface name as a parameter and tells
 # NetworkManager to disconnect that device, closing down any network

examples/python/dbus/list-devices.py

@@ -4,7 +4,7 @@
 # Copyright (C) 2011 - 2012 Red Hat, Inc.
 #
 
-import dbus, sys
+import dbus
 
 # This example lists basic information about network interfaces known to NM
 

examples/python/dbus/wifi-active-ap.py

@@ -11,7 +11,7 @@
 # https://developer.gnome.org/NetworkManager/1.0/ref-settings.html
 #
 
-import dbus, sys, time
+import dbus, sys
 
 bus = dbus.SystemBus()
 service_name = "org.freedesktop.NetworkManager"