[PRQ#67421] Deletion Request for python-pychromecast6

MarsSeed [1] filed a deletion request for python-pychromecast6 [2]: No longer needed. Obsolete legacy version from 2020 of python- pychromecast. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-pychromecast6/