fix changelog (#24039)

sdk/datafactory/azure-resourcemanager-datafactory/CHANGELOG.md

@@ -4,14 +4,6 @@
 
 - Azure Resource Manager DataFactory client library for Java. This package contains Microsoft Azure SDK for DataFactory Management SDK. The Azure Data Factory V2 management API provides a RESTful set of web services that interact with Azure Data Factory V2 services. Package tag package-2018-06. For documentation on how to use this package, please see [Azure Management Libraries for Java](https://aka.ms/azsdk/java/mgmt).
 
-### Features Added
-
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
-
 ### Breaking Changes
 
 * `models.ManagedIdentityCredential` was removed