code: def _ensure_none_host(self, config):
      if "host" in config:
          log.warning("config 'host' ignored in remote %s", self.name)
      config = dict(config)
      config["host"] = None
      return config
  
imports: import json
  import logging
  import os
  import re
  import subprocess
  import sys
  from guild import remote
  from guild import remote_util
  from guild import util
  from guild import var
  from .None import ssh
  from .None import ssh_util
label_desc: Use image node_id 2 for calling the AzureVMRemote obj's underlying member method code with example usage: obj._ensure_none_host(config) and returns: config