pci-assign: Remove broken -pcidevice and pci_add host
These qemu-kvm-only interfaces were broken by
b560a9ab9b, but no one
complained loud enough to get them fixed again. As we have properly
working "-device pci-assign"/"device_add" and we won't push this
upstream anyway, there is likely no point in restoring the interface.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Markus Armbruster <armbru@redhat.com>
CC: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>