code: protected int remove(Connection connection, RecordStream recordStream)
              throws SQLException, IOException {
          int count = 0;
          PreparedStatement ps = statement(connection, Query.DELETE_RECORD_HASH);
          while (recordStream.hasNext()) {
              VictimsRecord vr = recordStream.getNext();
              setObjects(ps, vr.hash);
              ps.addBatch();
              count++;
          }
          executeBatchAndClose(ps);
          return count;
      }
docs: Remove all records matching the records in the given {@link RecordStream}
  if it exists.
  
  @param recordStream
  @throws SQLException
  @throws IOException