Remove setup.py

As far as I understand this is deprecated.

setup.py

@@ -1,38 +0,0 @@
-import setuptools
-
-with open("README.md", "r") as fh:
-    long_description = fh.read()
-
-install_requires = [
-    "pandas",
-    "python-stdnum",
-    "requests",
-    "requests-cache",
-    "pycountry",
-    "langid",
-]
-
-setuptools.setup(
-    name="csv-metadata-quality",
-    version="0.6.1",
-    author="Alan Orth",
-    author_email="aorth@mjanja.ch",
-    description="A simple, but opinionated CSV quality checking and fixing pipeline for CSVs in the DSpace ecosystem.",
-    license="GPLv3",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/alanorth/csv-metadata-quality",
-    classifiers=[
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
-        "Operating System :: OS Independent",
-    ],
-    packages=["csv_metadata_quality"],
-    entry_points={
-        "console_scripts": ["csv-metadata-quality = csv_metadata_quality.__main__:main"]
-    },
-    include_package_data=True,
-    install_requires=install_requires,
-)