Update setup.py

Author: D4Vinci

setup.py

@@ -36,7 +36,6 @@
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",