installation: removal of Python classifiers

Signed-off-by: Alizee Pace <[email protected]>

setup.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of Invenio.
-# Copyright (C) 2015 CERN.
+# Copyright (C) 2015, 2016 CERN.
 #
 # Invenio is free software; you can redistribute it
 # and/or modify it under the terms of the GNU General Public License as
@@ -91,12 +91,10 @@
  'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
  'Topic :: Software Development :: Libraries :: Python Modules',
  "Programming Language :: Python :: 2",
- # 'Programming Language :: Python :: 2.6',
  'Programming Language :: Python :: 2.7',
+ 'Programming Language :: Python :: 3',
  'Programming Language :: Python :: 3.5',
  'Programming Language :: Python :: Implementation :: CPython',
- 'Programming Language :: Python :: Implementation :: PyPy',
- # 'Programming Language :: Python :: 3',
  ],
  tests_require=test_requirements,
 )