remove classifiers for python<=3.5

Author: Chilipp

setup.py

@@ -40,11 +40,6 @@ def run_tests(self):
         'Topic :: Scientific/Engineering :: GIS',
         'Topic :: Scientific/Engineering',
         'License :: OSI Approved :: GNU General Public License v2 (GPLv2)',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Operating System :: OS Independent',