Update CHANGELOG.md

Co-authored-by: Matthias Hörtenhuber <[email protected]>

Author: JoseEspinosa

CHANGELOG.md

@@ -13,7 +13,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [[#128](https://github.com/nf-core/chipseq/issues/128)] - Filter files with no peaks to avoid errors in downstream processes
 - [[#220](https://github.com/nf-core/chipseq/issues/220)] - Fix `phantompeakqualtools` protection stack overflow error
 - [[#233](https://github.com/nf-core/chipseq/issues/233)] - Add `chromap` to the available aligners
-- Port pipeline to the updated Nextflow DSL2 syntax adopted on nf-core/modules
 - Bump minimum Nextflow version from `21.04.0` -> `21.10.3`
 - Added `python3` shebang to appropriate scripts in `bin/` directory
 - [[#160](https://github.com/nf-core/chipseq/issues/160)] - Add `bowtie2` and `star` as available aligners, via the `--aligner` parameter