BLD: drop options.package_data from setup.cfg (#46271)

MANIFEST.in

@@ -1,4 +1,5 @@
 include RELEASE.md
+include versioneer.py
 
 graft doc
 prune doc/build
@@ -54,9 +55,6 @@ global-exclude *.pxi
 # exclude the whole directory to avoid running related tests in sdist
 prune pandas/tests/io/parser/data
 
-include versioneer.py
-include pandas/_version.py
-include pandas/io/formats/templates/*.tpl
-
+# Selectively re-add *.cxx files that were excluded above
 graft pandas/_libs/src
 graft pandas/_libs/tslibs/src

setup.cfg

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