qom/cpu: remove the unused CPU hot-plug notifier

Remove the unused CPU hot-plug notifier.
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NGu Zheng <guz.fnst@cn.fujitsu.com>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>

include/sysemu/sysemu.h

@@ -184,9 +184,6 @@ void do_pci_device_hot_remove(Monitor *mon, const QDict *qdict);
 /* generic hotplug */
 void drive_hot_add(Monitor *mon, const QDict *qdict);
 
-/* CPU hotplug */
-void qemu_register_cpu_added_notifier(Notifier *notifier);
-
 /* pcie aer error injection */
 void pcie_aer_inject_error_print(Monitor *mon, const QObject *data);
 int do_pcie_aer_inject_error(Monitor *mon,

qom/cpu.c

@@ -107,15 +107,6 @@ static void cpu_common_get_memory_mapping(CPUState *cpu,
     error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
 }
 
-/* CPU hot-plug notifiers */
-static NotifierList cpu_added_notifiers =
-    NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
-
-void qemu_register_cpu_added_notifier(Notifier *notifier)
-{
-    notifier_list_add(&cpu_added_notifiers, notifier);
-}
-
 void cpu_reset_interrupt(CPUState *cpu, int mask)
 {
     cpu->interrupt_request &= ~mask;
@@ -312,7 +303,6 @@ static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 
     if (dev->hotplugged) {
         cpu_synchronize_post_init(cpu);
-        notifier_list_notify(&cpu_added_notifiers, dev);
         cpu_resume(cpu);
     }
 }