[PRQ#42139] Deletion Request for python-externally-managed Accepted

Request #42139 has been Accepted by gromit [1]: Now that python provides python-externally-managed this has become a duplicate of the offcial package[a] in [core]. Thank you a ton for providing it, the maintainer found it quite useful[b] when adopting PEP 668. [a] https://archlinux.org/packages/core/x86_64/python/ [b] https://bugs.archlinux.org/task/78413#comment218521 [1] https://aur.archlinux.org/account/gromit/