pyproject.toml: Remove classifiers

The `license` property sets the License classifier automatically:
https://python-poetry.org/docs/pyproject/#classifiers

Remove developers classifier

pyproject.toml

@@ -38,10 +38,8 @@ build-backend = "poetry.core.masonry.api"
 
 classifiers = [
     "Development Status :: 5 - Production/Stable",
-    "License :: OSI Approved :: GNU Affero General Public License v3",
     "Operating System :: OS Independent",
     "Environment :: Console",
     "Intended Audience :: End Users/Desktop",
-    "Intended Audience :: Developers",
     "Natural Language :: English"
 ]