This mostly reverts ca23693d280de5c4031058da4d3041d830080484, which introduced a circular dependency between (gnu system linux-initrd) and (gnu system mapped-devices). Reported by Eric Bavier. * gnu/system/linux-initrd.scm (check-device-initrd-modules): Move to... * gnu/system/mapped-devices.scm (check-device-initrd-modules): ... here. * po/guix/POTFILES.in: Adjust accordingly.