memory: drop needless argument

The argument is unused since commit bdc44640 ("cpu: Use QTAILQ for CPU list").

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231009075231.150568-1-marcandre.lureau@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

system/memory_mapping.c

@@ -291,7 +291,7 @@ void guest_phys_blocks_append(GuestPhysBlockList *list)
     memory_listener_unregister(&g.listener);
 }
 
-static CPUState *find_paging_enabled_cpu(CPUState *start_cpu)
+static CPUState *find_paging_enabled_cpu(void)
 {
     CPUState *cpu;
 
@@ -312,7 +312,7 @@ void qemu_get_guest_memory_mapping(MemoryMappingList *list,
     GuestPhysBlock *block;
     ram_addr_t offset, length;
 
-    first_paging_enabled_cpu = find_paging_enabled_cpu(first_cpu);
+    first_paging_enabled_cpu = find_paging_enabled_cpu();
     if (first_paging_enabled_cpu) {
         for (cpu = first_paging_enabled_cpu; cpu != NULL;
              cpu = CPU_NEXT(cpu)) {