Remove misleading entry in changelog

The changelog entry removed mentions
`azuremanaged`, and that's something
we are not bringing from upstream.

Signed-off-by: Albert Callarisa <[email protected]>

Author: acroca

CHANGELOG.md

@@ -21,7 +21,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Added `set_custom_status` orchestrator API ([#31](https://github.com/microsoft/durabletask-python/pull/31)) - contributed by [@famarting](https://github.com/famarting)
 - Added `purge_orchestration` client API ([#34](https://github.com/microsoft/durabletask-python/pull/34)) - contributed by [@famarting](https://github.com/famarting)
-- Added new `durabletask-azuremanaged` package for use with the [Durable Task Scheduler](https://learn.microsoft.com/azure/azure-functions/durable/durable-task-scheduler/durable-task-scheduler) - by [@RyanLettieri](https://github.com/RyanLettieri)
 
 ### Changes