login: radius: T3192: drop workaround required by get_config_dict()
login: radius: T3192: drop workaround required by get_config_dict()

The workaround is no longer required, as the issue was resolved in
get_config_dict() so if it is a <multi/> node, a list is always returned.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x