Execution example::

  logical_table_remove \
    --logical_table Logs \
    --shard_key timestamp
  # [
  #   [
  #     -55,
  #     1337566253.89858,
  #     0.000355720520019531,
  #     "object corrupt: <[object][remove][index][Logs_20160320.timestamp][set] hook has a dangling reference: <Timestamps.logs_20160320",
  #     [
  #       [
  #         "remove",
  #         "lib/groonga/plugins/sharding/logical_table_remove.rb",
  #         2929
  #       ]
  #     ]
  #   ]
  # ]
