Remove py35 from setup.cfg
This is a followup to Drop py35 jobs from gate and tox env[1].
[1]
@@ -16,7 +16,6 @@ classifier =
Programming Language :: Python :: 2
Programming Language :: Python :: 2.7
Programming Language :: Python :: 3
- Programming Language :: Python :: 3.5
Programming Language :: Python :: 3.6
[global]
