Remove deprecated License classifier from setup.py (#680)

Author: bmunkholm

setup.py

@@ -37,7 +37,6 @@
     long_description_content_type="text/x-rst",
     classifiers=[
         "Intended Audience :: Developers",
-        "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",