Remove license classifier deprecated by PEP 639

Signed-off-by: mulhern <[email protected]>

Author: mulkieran

setup.cfg

@@ -13,7 +13,6 @@ platforms =
 classifiers=
     Development Status :: 4 - Beta
     Intended Audience :: Developers
-    License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)
     Operating System :: POSIX :: Linux
     Programming Language :: Python
     Programming Language :: Python :: 3