Clear the device info.

def clear_info(self):
        """Clear the device info."""
        self._version_text = None
        self._inventory_text = None
        self._users_text = None
        self.os_version = None
        self.os_type = None
        self.family = None
        self.platform = None
        self.udi = None
        # self.is_console = None
        self.prompt = None
        self.prompt_re = None