DOC update whatsnew_0.23 with removal of _safe_tags()
@@ -652,6 +652,12 @@ Changelog
and support for classes will be removed in 0.24. Pass instances instead.
:pr:`17032` by `Nicolas Hug`_.
+- |API| The private utility `_safe_tags` in `utils.estimator_checks` was
+ removed, hence all tags should be obtained through `estimator._get_tags()`.
+ Note that Mixins like `RegressorMixin` must come *before* base classes
+ in the MRO for `_get_tags()` to work properly.
+ :pr:`16950` by `Nicolas Hug`_.
+
- |FIX| :func:`utils.all_estimators` now only returns public estimators.
:pr:`15380` by `Thomas Fan`_.
