message: Comment out unused parameters instead of using `static_cast<void>`.
diff: @@ -62,11 +62,9 @@ StringData GetIndexData<Timestamp>::get_index_data(const Timestamp& dt, StringIn
  }
  template <>
  -size_t IndexArray::from_list<index_FindFirst>(StringData value, InternalFindResult& result_ref,
  +size_t IndexArray::from_list<index_FindFirst>(StringData value, InternalFindResult& /* result_ref */,
  const IntegerColumn& rows, ColumnBase* column) const
  {
  - static_cast<void>(result_ref);
  -
  SortedListComparator slc(*column);
  IntegerColumn::const_iterator it_end = rows.cend();
  @@ -86,11 +84,9 @@ size_t IndexArray::from_list<index_FindFirst>(StringData value, InternalFindResu
  }
  template <>
  -size_t IndexArray::from_list<index_Count>(StringData value, InternalFindResult& result_ref, const IntegerColumn& rows,
  - ColumnBase* column) const
  +size_t IndexArray::from_list<index_Count>(StringData value, InternalFindResult& /* result_ref */,
  + const IntegerColumn& rows, ColumnBase* column) const
  {
  - static_cast<void>(result_ref);
  -
  SortedListComparator slc(*column);
  IntegerColumn::const_iterator it_end = rows.cend();
  