fix: remove deprecated license classifier for Python 3.14 compatibility

setuptools on Python 3.14 enforces PEP 639 and rejects the old-style
'License :: OSI Approved :: MIT License' classifier when the
license field is already set. The license = "MIT" in [project] is
the correct declaration.

Signed-off-by: Sebastien Tardif <sebtardif@ncf.ca>

Author: SebTardif

pyproject.toml

@@ -15,7 +15,6 @@ authors = [
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",