remove note on bug behaviour < 58.5.3

Author: DanielYang59

docs/userguide/datafiles.rst

@@ -380,12 +380,6 @@ In plain language, the file should not be excluded by ``exclude-package-data``
     p - file selected by "package-data"
     m - file included in "MANIFEST.in"
 
-.. note::
-    Different versions of ``setuptools`` might behave differently. The above
-    description applies to versions after ``58.5.3`` (exclusive). For information
-    on the behavior of earlier versions and more details, please refer to the
-    `GitHub repository <https://github.com/abravalheri/experiment-setuptools-package-data>`_.
-
 Summary
 -------