Update CHANGELOG.md

Co-authored-by: Daniel Weindl <[email protected]>

Author: dilpath

CHANGELOG.md

@@ -25,10 +25,6 @@ Validation will become increasingly atomic and OOP, to support extension-specifi
 * Fix validation for remote files by @dweindl in https://github.com/PEtab-dev/libpetab-python/pull/287
 * New validation API by @dweindl in https://github.com/PEtab-dev/libpetab-python/pull/288
 
-**Packaging and CI**
-
-* setup.py -> pyproject.toml by @dweindl in https://github.com/PEtab-dev/libpetab-python/pull/275
-* Ruff pyupgrade: python3.10 by @dweindl in https://github.com/PEtab-dev/libpetab-python/pull/276
 
 **Documentation**