[PRQ#43584] Deletion Request for trac-xmlrpc-svn

MarsSeed [1] filed a deletion request for trac-xmlrpc-svn [2]: Unneeded python2 based addon for trac. The latter is broken since Nov 2021 and is now submitted for deletion (PRQ#43579). Safe to delete this abandoned, unused package as well. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/trac-xmlrpc-svn/