fix: SetuptoolsDeprecationWarning: License classifiers are deprecated.

/home/anders/.cache/uv/builds-v0/.tmpXAxITl/lib/python3.12/site-packages/setuptools/dist.py:751: SetuptoolsDeprecationWarning: License classifiers are deprecated.
!!

        ********************************************************************************
        Please consider removing the following classifiers in favor of a SPDX license expression:

        License :: OSI Approved :: MIT License

        See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
        ********************************************************************************

!!
  self._finalize_license_expression()

Signed-off-by: Anders Kaseorg <[email protected]>

Author: andersk

setup.py

@@ -33,7 +33,6 @@
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
-        "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3.7",