message: removed boilerplate
diff: # 12.9.0 Release notes
  ### Enhancements
  -* <New feature description> (PR [#????](https://github.com/realm/realm-core/pull/????))
  * Prioritize integration of local changes over remote changes - shorten the time users may have to wait when committing local changes. Stop storing downloaded changesets in history. ([PR #5844](https://github.com/realm/realm-core/pull/5844)).
  * Greatly improve the performance of sorting or distincting a Dictionary's keys or values. The most expensive operation is now performed O(log N) rather than O(N log N) times, and large Dictionaries can see upwards of 99% reduction in time to sort. ([PR #5166](https://github.com/realm/realm-core/pulls/5166))
  * Expose `realm_get_value_by_property_index` to the C API. ([PR #5906](https://github.com/realm/realm-core/pull/5906))
  * Add support for fetching directly backlinks in the C API. ([PR #5904](https://github.com/realm/realm-core/pull/5904))
  ### Fixed
  -* <How do the end-user experience this issue? what was the impact?> ([#????](https://github.com/realm/realm-core/issues/????), since v?.?.?)
  * Fix a data race reported by thread sanitizer when preparing to deliver change notifications. This probably did not cause observable problems in practice ([PR #5892](https://github.com/realm/realm-core/pull/5892) since 12.7.0).
  * Changed the behaviour of creating a collection of non-nullable Mixed type to throw a descriptive error message rather than asserting in debug mode. ([#5894](https://github.com/realm/realm-core/issues/5894), since the introduction of the Mixed type).
  * Fix a use-after-free when a sync session is closed and the app is destroyed at the same time ([#5752](https://github.com/realm/realm-core/issues/5752), since v11.5.2).
  