Drop 0002-ARM-dts-n900-remove-rx51-battery.patch, because this wasn't
needed for postmarketOS in the first place. The patch was created for
Maemo Leste as upower quirk initially and they don't carry it anymore
either.
Drop other patches, as they have been upstreamed.
Co-Authored-By: Oliver Smith <ollieparanoid@postmarketos.org>
