[setup] Temporarily remove framework trove classifier to unblock pypi upload...

[setup] Temporarily remove framework trove classifier to unblock pypi upload (c.f. issue beat.backend.python#19) [ci skip]

setup.py

@@ -56,7 +56,6 @@ setup(
     },
 
     classifiers = [
-        'Framework :: BEAT',
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: GNU Affero General Public License v3',