code: function deleteContentItems(cItemURIs, callback) {
    cItemURIs.forEach(function(uri) {
      retrieveByURI(uri, function(err, uriRes) {
        if (err) { console.log('delete retrieve err', err); return; }
        if (!uriRes._source) { console.log('delete not retrieved', uriRes); return; }
        // save to removedItem
        getEs().index({_type: 'removedItem'}, uriRes._source, function (err, removeRes) {
          // annomerged
          if (err) {
            console.log('delete anno err', err);
          }
          getEs().delete({ _type: 'contentItem', _id : encodeURIComponent(encodeURIComponent(uri))}, function(err, deleteRes) {
            if (callback) {
              callback(err, deleteRes);
            }
            if (err) {
              console.log('delete err', err);
              return;
            }
          });
        });
      });
    });
  }
docs: delete (move to remove) array of cItem by URI