BLD: drop options.package_data from setup.cfg

These two glob patterns are already covered because:
- They are listed in MANIFEST.in
AND
- include_package_data is set to True

See #46270

Author: NickCrews

setup.cfg

@@ -51,9 +51,6 @@ test =
     pytest>=6.0
     pytest-xdist>=1.31
 
-[options.package_data]
-* = templates/*, _libs/**/*.dll
-
 [build_ext]
 inplace = True