ioh3420: remove unused ioh3420_init() declaration

commit 0f9b177
    ioh3420: Remove obsoleted, unused ioh3420_init function
removed the implementation of ioh3420_init

Drop the declaration from the header file as well.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Knut Omang <knut.omang@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/pci-bridge/ioh3420.h

@@ -3,8 +3,4 @@
 
 #include "hw/pci/pcie_port.h"
 
-PCIESlot *ioh3420_init(PCIBus *bus, int devfn, bool multifunction,
-                       const char *bus_name, pci_map_irq_fn map_irq,
-                       uint8_t port, uint8_t chassis, uint16_t slot);
-
 #endif /* QEMU_IOH3420_H */