Draft: Clean up dataclasses
We need to get rid of a load of old stuff (template dataclasses etc.).
Additionally, I'd like to rename dataclasses since there is a standardlib module in Python 3.7+ with the same name (which we would like to use).
We need to get rid of a load of old stuff (template dataclasses etc.).
Additionally, I'd like to rename dataclasses since there is a standardlib module in Python 3.7+ with the same name (which we would like to use).