[3.7] Removed dangling `since Python` at the end of library/xml.rst. (GH-11201) (GH-11231)



(cherry picked from commit 82d73554e4764350bfd8f13957c5e024ac95c4af)


Co-authored-by: Jules Lasne (jlasne) <jlasne@student.42.fr>
1 file changed