freaknils  filed a deletion request for python-bme280 :
Old package for software that is not supported anymore
 https://aur.archlinux.org/account/freaknils/  https://aur.archlinux.org/pkgbase/python-bme280/
Request #16809 has been rejected by diabonas :
The package still builds fine, I couldn't find any hint that the upstream software is not supported any more. Please provide more information, preferably links to official statements from upstream.