[TASK] Remove changelog

Changelog is in git anyway
added changelog in .gitignore

Change-Id: Ibcd91240026c0cf35564143bcd120022a5d75bd1
Resolves: #59721
Releases: 4.0
Reviewed-on: https://review.typo3.org/30929
Reviewed-by: Ivan Dharma Kartolo
Tested-by: Ivan Dharma Kartolo