remove references to setup.py in docs

[jameslamb]

Description

Removes remaining references to setup.py in documentation.

This project no longer has a setup.py as of its switch to pyproject.toml + scikit-build-core (see #1287, #1300).

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

How I tested this

Built the library in editable mode and ran its tests on a machine w/ 8 V100s.

nvidia-smi output (click me)

+-----------------------------------------------------------------------------+
| NVIDIA-SMI 525.105.17   Driver Version: 525.105.17   CUDA Version: 12.0     |
|-------------------------------+----------------------+----------------------+

mamba env create \
    --name rmm-dev \
    -f ./conda/environments/all_cuda-120_arch-x86_64.yaml

source activate rmm-dev

python -m pip install -e ./python

pytest -v

Saw all the tests pass:

... ==== 773 passed, 5 skipped in 48.82s ...

To test that editable was working, added the following:

echo "print('beep boop')" >> ./python/rmm/__init__.py
python -c "import rmm"
# beep boop

Confirmed that this caught all references to setup.py like this:

git grep -E 'setup\.py'

[wence-]

Thanks!

[harrism]

/merge