Remove policyengine-us-data dependency

[nikhilwoodruff]

This is breaking Core tests. -us-data depends on torch as of the L0 penalty (though didn't add it to the direct dependencies, or hide it in a function FYI @baogorek @juaristi22 @eccuraa),.

[juaristi22]

torch was added to the direct dependencies, so i was surprised tests where still breaking. chatgpt is suggesting is not a missing dependency issue but a problem with torch not supporting python 3.13 yet.

i added a test to us-data to make sure microsim can run on direct dependencies only, see PR #397. here, even if we are using python3.13 torch seems to get installed (probably uv is managing to import an older torch version that still works) and tests pass.

my hypothesis is that this is breaking because in the -core workflow we import -us-data with "no-deps":

- name: Install -us package from PyPI
        run: |
          if [[ "${{ matrix.python-version }}" == "3.13" ]]; then
            # For Python 3.13, install newer tables first and ignore conflicts
            pip install "tables>=3.10.1"
            pip install policyengine-us --no-deps
            # Install remaining dependencies manually
            pip install click==8.1.3 pathlib pytest-dependency synthimpute tabulate
            pip install policyengine-us-data --no-deps
          else
            python -m pip install policyengine-us
          fi

torch is not getting installed, breaking tests. we can add a manual torch install command in the block above maybe that will fix it?

[MaxGhenis]

pytorch supports 3.13 pytorch/pytorch#130249