code: private static CampaignFeed deleteCampaignFeed(AdWordsServicesInterface adWordsServices,
        AdWordsSession session, CampaignFeed campaignFeed) throws RemoteException {
      // Get the CampaignFeedService.
      CampaignFeedServiceInterface campaignFeedService =
          adWordsServices.get(session, CampaignFeedServiceInterface.class);
  
      CampaignFeedOperation operation = new CampaignFeedOperation();
      operation.setOperand(campaignFeed);
      operation.setOperator(Operator.REMOVE);
  
      return campaignFeedService.mutate(new CampaignFeedOperation[] {operation}).getValue(0);
    }
docs: Deletes a campaign feed.