Remove dataclasses dependency

[tlancaster6]

Remove broken dataclasses dependency

The dataclasses>=0.8 requirement cannot be satisfied on Python 3.10+ because the PyPI backport package was never published above version 0.6 (it was only needed for Python 3.6). Since this project already requires python >= 3.10, where dataclasses is part of the standard library, the dependency line serves no purpose and prevents installation:

ERROR: Could not find a version that satisfies the requirement dataclasses>=0.8 (from romav2)

[bertaveira]

I can attest to this. Since this repo requires python 3.10+ then dataclasses should not be a dependency as it is part of the standard library. I cannot add this as a dependency of my repo since it complains about this in pip install.