cleanup changelog

Author: Stephan Dilly

CHANGELOG.md

@@ -9,7 +9,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 - support *force push* command [[@WizardOhio24](https://github.com/WizardOhio24)] ([#274](https://github.com/extrawurst/gitui/issues/274)) 
-- support mouse scrolling [[@WizardOhio24](https://github.com/WizardOhio24)] ([#306](https://github.com/extrawurst/gitui/issues/306)) 
 - show used char count in input texts ([#466](https://github.com/extrawurst/gitui/issues/466))
 
 ![charcount](assets/char_count.gif)