message: code review: Simplify recursivity
diff: @@ -1677,14 +1677,7 @@ class Simplex_tree {
  * @param[in] min_dim The minimal dimension. Default value is 0.
  */
  void reset_filtration(Filtration_value filt_value, int min_dim = 0) {
  - for (auto& simplex : root_.members()) {
  - if (min_dim <= 0) {
  - simplex.second.assign_filtration(filt_value);
  - }
  - if (has_children(&simplex)) {
  - rec_reset_filtration(simplex.second.children(), filt_value, min_dim - 1);
  - }
  - }
  + rec_reset_filtration(&root_, filt_value, min_dim);
  clear_filtration(); // Drop the cache.
  }
  