Update Changelog.md

Author: lane-formio

Changelog.md

@@ -4,10 +4,6 @@ All notable changes to this project will be documented in this file
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [Unreleased: 5.10.13]
-### Changed
- - Official Release
-
 ## 5.10.13-rc.2
 ### Changed
  - Update pdf-server@5.10.13-rc.2