Remove setup_requires to avoid deprecation warning on RTD builds (could break October 25)

[asmacdo]

In the rtd builds we get a warning:

Running Sphinx v8.2.3 /home/docs/checkouts/readthedocs.org/user_builds/reproman/envs/latest/lib/python3.12/site-packages/setuptools/__init__.py:92: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated. !! ******************************************************************************** Requirements should be satisfied by a PEP 517 installer. If you are using pip, you can try pip install --use-pep517. By 2025-Oct-31, you need to update your project and remove deprecated calls or your builds will no longer be supported. ********************************************************************************

IIUC this is unrelated to our readthedocs.yaml. docs builds require a full install of reproman , so this is likely caused by our setup.py which has:

setup_requires=["setuptools_scm"],

This triggers setuptools.installer / fetch_build_eggs, which are deprecated and will be removed by 2025-10-31.

[yarikoptic]

do you have access to specify labels for issues @asmacdo ?

[asmacdo]

Yes, though I'm not sure if it's only a docs issue, might be a general install issue.