contramundum53

I think the interface has changed since the description was written, we need to pass additional `None` to the argument of `_calculate_weights_below_for_multi_objective`. I updated the description.

@nzw0301 We can directly use `dataset_api` in `naslib`, which does not include the model. That is what I did with NasBench201.

I see, it seems that NASBench301 is implemented in a different way from NASBench201. It might be better not to use `naslib`.

I think `plot_slice` is much simpler than `plot_contour` and thus we could make `test_slice.py` much simpler than `test_contour.py`.

@HideakiImamura @xadrianzetx Could you review this PR? Please feel free to unassign yourself if you are busy.

I have removed many unnecessary tests.

I fixed the code according to @xadrianzetx 's comments. PTAL.

@knshnb Could you review this PR?

@knshnb Sorry for being late. I fixed the suggested points. PTAL.

I added "include_dominated_trials" and "constraints_func".