Remove license classifier (PEP 639)

Author: rfinnie

pyproject.toml

@@ -18,7 +18,6 @@ classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Environment :: Console",
     "Intended Audience :: System Administrators",
-    "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)",
     "Natural Language :: English",
     "Operating System :: MacOS :: MacOS X",
     "Operating System :: Microsoft :: Windows",