[setup] remove py2.7

Author: jgrewe

setup.py

@@ -49,7 +49,6 @@ def get_wheel_data():
 classifiers = [
     'Development Status :: 5 - Production/Stable',
     'Programming Language :: Python',
-    'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3.6',
     'Programming Language :: Python :: 3.7',
     'Topic :: Scientific/Engineering'