Use only valid setup.py classifiers from https://pypi.org/classifiers/

Author: mdmintz

setup.py

@@ -23,7 +23,6 @@
         "Topic :: Scientific/Engineering",
         "Topic :: Software Development",
         "Operating System :: Microsoft :: Windows",
-        "Operating System :: Linux",
         "Operating System :: Unix",
         "Operating System :: MacOS",
         "Programming Language :: Python",