wireless: T6425: adjust to latest country-code changes

Commit 9e22ab6 ("wireless: T6318: move country-code to a system wide
configuration") removed the per wifi interface setting for a country-code. This
commit adjust the smoketests to the new design.

smoketest/scripts/cli/test_interfaces_wireless.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2020-2023 VyOS maintainers and contributors
+# Copyright (C) 2020-2024 VyOS maintainers and contributors
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 or later as
@@ -166,7 +166,6 @@ def test_wireless_hostapd_vht_mu_beamformer_config(self):
         antennas = '3'
 
         self.cli_set(self._base_path + [interface, 'ssid', ssid])
-        self.cli_set(self._base_path + [interface, 'country-code', 'se'])
         self.cli_set(self._base_path + [interface, 'type', 'access-point'])
         self.cli_set(self._base_path + [interface, 'channel', '36'])
 
@@ -236,7 +235,6 @@ def test_wireless_hostapd_vht_su_beamformer_config(self):
         antennas = '3'
 
         self.cli_set(self._base_path + [interface, 'ssid', ssid])
-        self.cli_set(self._base_path + [interface, 'country-code', 'se'])
         self.cli_set(self._base_path + [interface, 'type', 'access-point'])
         self.cli_set(self._base_path + [interface, 'channel', '36'])