python: finish removing Python 3.6

CI-Tags: #no_auto_pr

Author: Jason Mobarak

python/setup.py

@@ -24,7 +24,6 @@
   'Programming Language :: Python',
   'Topic :: Scientific/Engineering :: Interface Engine/Protocol Translator',
   'Topic :: Software Development :: Libraries :: Python Modules',
-  'Programming Language :: Python :: 3.6',
   'Programming Language :: Python :: 3.7',
   'Programming Language :: Python :: 3.8',
   'Programming Language :: Python :: 3.9',