net_hub_port_find is unused since 2018's commitaf1a5c3eb4
("net: Remove the deprecated "vlan" parameter") qemu_receive_packet_iov is unused since commitffbd2dbd8e
("e1000e: Perform software segmentation for loopback") in turn it was the last user of qemu_net_queue_receive_iov. Remove them. Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>