code: function rm(uri, callback) {
    util.rm(uri, function(err, val) {
      if (!err) {
        callback(null, val, uri)
      }
    })
  }
docs: rm gets list of files for a given container
  
  @param {String} argv[2] url
  @param {String} argv[3] data
  @callback {bin~cb} callback