message: Remove unused list helper functions
diff: @@ -547,30 +547,6 @@ inline LnkLst Obj::get_linklist(StringData col_name) const
  return get_linklist(get_column_key(col_name));
  }
  -template <class T>
  -inline ColumnSumType<T> list_sum(const Lst<T>& list, size_t* return_cnt = nullptr)
  -{
  - return bptree_sum(list.get_tree(), return_cnt);
  -}
  -
  -template <class T>
  -inline ColumnMinMaxType<T> list_maximum(const Lst<T>& list, size_t* return_ndx = nullptr)
  -{
  - return bptree_maximum(list.get_tree(), return_ndx);
  -}
  -
  -template <class T>
  -inline ColumnMinMaxType<T> list_minimum(const Lst<T>& list, size_t* return_ndx = nullptr)
  -{
  - return bptree_minimum(list.get_tree(), return_ndx);
  -}
  -
  -template <class T>
  -inline ColumnAverageType<T> list_average(const Lst<T>& list, size_t* return_cnt = nullptr)
  -{
  - return bptree_average(list.get_tree(), return_cnt);
  -}
  -
  template <class T>
  void Lst<T>::clear()
  {
  