BUG: Installing pandas places pyproject.toml in site-packages

[shughes-uk]

Pandas version checks

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• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the main branch of pandas.

Reproducible Example

pip install --upgrade --pre --extra-index https://pypi.anaconda.org/scipy-wheels-nightly/simple pandas

Issue Description

I noticed the root of my site-packages folder had a rogue pyproject.toml in it from pandas. Not sure if this is a issue with the wheel build or something but it's definitely not designed behavior. I'm not sure if this just an issue with the nightly or not.

Removing it and re-running the install resulted in the same behavior.

pip 23.0.1

Expected Behavior

No pyproject.toml should be placed in the root of site-packages

Installed Versions

INSTALLED VERSIONS

commit : 3083ae9
python : 3.9.16.final.0
python-bits : 64
OS : Darwin
OS-release : 22.3.0
Version : Darwin Kernel Version 22.3.0: Mon Jan 30 20:38:37 PST 2023; root:xnu-8792.81.3~2/RELEASE_ARM64_T6000
machine : arm64
processor : arm
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

pandas : 2.1.0.dev0+289.g3083ae932e
numpy : 1.25.0.dev0+941.gb35aac2c3
pytz : 2022.7.1
dateutil : 2.8.2
setuptools : 67.6.0
pip : 23.0.1
Cython : None
pytest : None
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : None
html5lib : 1.1
pymysql : None
psycopg2 : None
jinja2 : 3.1.2
IPython : 8.11.0
pandas_datareader: None
bs4 : 4.11.2
bottleneck : None
brotli :
fastparquet : None
fsspec : 2023.3.0
gcsfs : None
matplotlib : None
numba : None
numexpr : None
odfpy : None
openpyxl : None
pandas_gbq : None
pyarrow : None
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : None
snappy : None
sqlalchemy : None
tables : None
tabulate : None
xarray : None
xlrd : None
zstandard : None
tzdata : 2022.7
qtpy : None
pyqt5 : None

[mroeschke]

This was added in #50330 because pd.test needs the pytest markers defined in pyproject.toml to work fully.

[shughes-uk]

Putting it in site-packages is not the place to put it as there's a risk of it colliding with other packages or causing weird issues , site-packages/pandas would be ok I think?

If this was the behavior only for the nightly package that might also be ok

[mroeschke]

cc @lithomas1