code: void removeDocument(String uuid) throws IOException
     {
        update(Arrays.asList(new String[]{uuid}), Collections.<Document> emptyList());
     }
docs: Deletes the first document that matches the <code>uuid</code>.
  
  @param uuid
  document that match this <code>uuid</code> will be deleted.
  @throws IOException
  if an error occurs while deleting the document.