Remove non-2.9 notes

Signed-off-by: Tyler Ohlsen <[email protected]>

release-notes/opensearch-anomaly-detection.release-notes-2.9.0.0.md

@@ -2,12 +2,6 @@ Compatible with OpenSearch 2.9.0.
 
 ### Enhancements
 
-* Refactor Shared Settings, Introduce Dynamic Forecast Settings, Rename ([#912](https://github.com/opensearch-project/anomaly-detection/pull/912))
-* Refactoring Index Creation for Improved Code Reuse and Consistency ([#932](https://github.com/opensearch-project/anomaly-detection/pull/932))
-* Add ForecastResult and Refactor Shared Code ([#941](https://github.com/opensearch-project/anomaly-detection/pull/941))
-* Refactor: Migrate files from 'ad' to 'timeseries' package ([#918](https://github.com/opensearch-project/anomaly-detection/pull/918))
-* Add Forecaster class ([#920](https://github.com/opensearch-project/anomaly-detection/pull/920))
-* Refactor: Reorganize code for Forecasting and AnomalyDetector packages ([#925](https://github.com/opensearch-project/anomaly-detection/pull/925))
 * Enforce DOCUMENT Replication for AD Indices and Adjust Primary Shards ([#948](https://github.com/opensearch-project/anomaly-detection/pull/948))
 
 ### Infrastructure
@@ -19,5 +13,4 @@ Compatible with OpenSearch 2.9.0.
 
 ### Documentation
 
-* add 2.8 release notes ([#915](https://github.com/opensearch-project/anomaly-detection/pull/915))
 * Updated Maintainers and CODE_OWNERS list ([#926](https://github.com/opensearch-project/anomaly-detection/pull/926))