[PRQ#74055] Deletion Request for libxml2-2.13

[notify]

envolution [1] filed a deletion request for libxml2-2.13 [2]:

can be deleted as libxml2-legacy exists in extra

[1] https://aur.archlinux.org/account/envolution/
[2] https://aur.archlinux.org/pkgbase/libxml2-2.13/