Remove the superfluous check for a duplicate FuDevice addition
Remove the superfluous check for a duplicate FuDevice addition

hughsie/fwupd,hughsie/fwupd,vathpela/fwupd,superm1/fwupd,fwupd/fwupd,vathpela/fwupd,superm1/fwupd,vathpela/fwupd,vathpela/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,superm1/fwupd,fwupd/fwupd,hughsie/fwupd