Remove "Django CMS" framework classifiers again

Apparently this means literally the Django CMS, not the Django framework.

This reverts commit f66c991.

Author: timobrembeck

setup.py

@@ -50,10 +50,6 @@ def find_version(*parts):
         "Framework :: Django :: 3.2",
         "Framework :: Django :: 4.0",
         "Framework :: Django :: 4.1",
-        "Framework :: Django CMS",
-        "Framework :: Django CMS :: 3.2",
-        "Framework :: Django CMS :: 4.0",
-        "Framework :: Django CMS :: 4.1",
         "Framework :: Sphinx :: Extension",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",