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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def DeleteCampaignFeed(client, campaign_feed):
 """Deletes a campaign feed. Args: client: an AdWordsClient instance. campaign_feed: the campaign feed to delete. """

  campaign_feed_service = client.GetService('CampaignFeedService', 'v201809')

  operation = {
      'operand': campaign_feed,
      'operator': 'REMOVE'
  }

  campaign_feed_service.mutate([operation])