fix license expr

Author: pmp-p

setup.cfg

@@ -14,7 +14,6 @@ project_urls =
     Project Page = https://github.com/pygame-web
 classifiers =
     Programming Language :: Python :: 3
-    License :: OSI Approved :: MIT License
     Operating System :: OS Independent
 # Environment :: WebAssembly
 # Environment :: WebAssembly :: Emscripten