Remove ccsync

[SGI-CAPP-AT2]

                                // CCSync v3 is deprecated, so hiding it for now
                                // RadioListTile<String>(
                                //   title: const Text('CCSync (v3)'),
                                //   value: 'TW3',
                                //   groupValue: selectedMode,
                                //   onChanged: (String? value) {
                                //     setState(() {
                                //       selectedMode = value;
                                //     });
                                //   },
                                // ),