chore: remove outdated changelog statements

CHANGELOG.md

@@ -4,14 +4,6 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
-### Added
-
-- A `ObjectManager` implementation with various configuration methods for using in tests
-- A `Store\Store` implementation for store dependent functionalities
-- A `Store\Website` implementation for website dependent functionalities
-- A `Store\StoreGroup` implementation for store group dependent functionalities
-- A `Store\StoreManager` implementation with bootstrap methods for functionalities that require resolving current store
 
 
 [Unreleased]: https://github.com/EcomDev/magento2-test-essentials/compare/1f1b2e7d02eb8d396662b71b61c7120470800713...main