Remove auto-connect to 10767 on startup

* not necessary with greeter
* Port is default in greeter text field

Change-Id: If89cb72ec6af20fd4d83488af85b942c5f54b105
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/30531
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Alexander Zaft <a.zaft@fz-juelich.de>

bin/frappy-gui

@@ -49,7 +49,7 @@ def parseArgv(argv):
                           action='store_true', default=False)
     parser.add_argument('node',
                         help='Nodes the Gui should connect to.\n', metavar='host[:port]',
-                        nargs='*', type=str, default=['localhost:10767'])
+                        nargs='*', type=str, default=[])
     return parser.parse_args(argv)