Pep8 and pyflakes fixes to sugar-activity

bin/sugar-activity

@@ -33,9 +33,7 @@ from dbus.mainloop.glib import DBusGMainLoop
 DBusGMainLoop(set_as_default=True)
 
 from sugar3.activity import activityhandle
-from sugar3.activity import i18n
 from sugar3 import config
-import sugar3
 from sugar3.bundle.activitybundle import ActivityBundle
 from sugar3 import logger
 
@@ -69,6 +67,7 @@ class SingleProcess(dbus.service.Object):
         handle = activityhandle.create_from_dict(handle_dict)
         create_activity_instance(self.constructor, handle)
 
+
 def main():
     parser = OptionParser()
     parser.add_option('-b', '--bundle-id', dest='bundle_id',