Removing Jenkinsfile (#1316)

Author: sebastian-peter

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 - Replaced `return this` with `return thisInstance` in CopyBuilders [#1250](https://github.com/ie3-institute/PowerSystemDataModel/issues/1250)
+- Removed Jenkinsfile [#1315](https://github.com/ie3-institute/PowerSystemDataModel/issues/1315)
 
 ## [6.0.0] - 2025-02-27