message: no longer incrementing sequence usage count for currval
diff: @@ -32,8 +32,6 @@ static int64_t CurrSequenceValue(Transaction &transaction, SequenceCatalogEntry
  throw SequenceException("currval: sequence has not been used yet.");
  }
  result = seq->counter - seq->increment;
  - seq->usage_count++; // should this be incremented?
  - transaction.sequence_usage[seq] = SequenceValue(seq->usage_count, seq->counter);
  return result;
  }
  