Update setup.py

Author: matkatz

wrappers/python/setup.py

@@ -52,7 +52,6 @@ def __len__(self):
         'Intended Audience :: Education',
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: Apache Software License',
-        'Operating System :: MacOS',
         'Operating System :: Microsoft :: Windows',
         'Operating System :: POSIX',
         'Operating System :: Unix',