disable phone-home

Index: chirp/wxui/__init__.py
--- chirp/wxui/__init__.py.orig
+++ chirp/wxui/__init__.py
@@ -203,9 +203,6 @@ def chirpmain():
     if args.action:
         wx.CallAfter(getattr(mainwindow, '_menu_%s' % args.action), None)
 
-    report.check_for_updates(
-        lambda ver: wx.CallAfter(main.display_update_notice, ver))
-
     if sys.platform == 'linux' and args.install_desktop_app:
         try:
             maybe_install_desktop()
