Version 34 of the device-nokia-n900 package implemented an udev-based script for shutdown due to critically-low battery condition. Therefore, depending on UPower is no longer necessary. To keep the i3blocks status bar working in the absence of UPower, switch back to basic sysfs polling. Signed-off-By: Sicelo A. Mhlongo <absicsz@gmail.com> Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8472>