Remove "Programming Language" lables from pyproject.toml

[kasium]

Seems like pypi can understand the python version automatically. Let's check and remove the labels

[kasium]

@maurerle you had the point in the eralchemy meeting that the classifiers are no longer needed. Do you recall if there is any documentation for this?

[maurerle]

Oh I just double-checked and found out that this is a poetry-only feature: https://python-poetry.org/docs/pyproject/#classifiers

it is not mentioned here: https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#classifiers

And https://pypi.org/project/eralchemy2/ does not include these classifiers since I switched back to setuptools.. :)

[maurerle]

But the license classifier is set from the version argument at least.. :)

[kasium]

Thanks for checking!