MarsSeed  filed a deletion request for python2-ndg-httpsclient :
Please delete. Deprecated since 2018, not used anymore.
Has not been required by Python's urllib3 and requests since 2016, but was kept as depends for those two (at least for their legacy Python 2 packages) in Arch repos until being dropped from there.
So when I restored python2-requests and python2-urllib3 to AUR, I've imported this back with them.
Now I've done some thorough cleanup for the latter two packages, and it resulted in this package not being needed by anything. So it's best to remove it.
Request #36146 has been Accepted by Muflone :
[Autogenerated] Accepted deletion for python2-ndg-httpsclient.