remove deprecated license classifier per PEP 639

Author: cakemanny

setup.py

@@ -37,7 +37,6 @@
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
-        "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Intended Audience :: Developers",
         "Development Status :: 4 - Beta",