arm: hisi: drop extern hip01_cpu_die

Since the hip01 doesn't support cpu hotplug now, and doesn't implement
the hip01_cpu_die function, drop the declaration.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
diff --git a/arch/arm/mach-hisi/core.h b/arch/arm/mach-hisi/core.h
index e883583..c58b68a 100644
--- a/arch/arm/mach-hisi/core.h
+++ b/arch/arm/mach-hisi/core.h
@@ -15,5 +15,4 @@ extern void hix5hd2_set_cpu(int cpu, bool enable);
 extern void hix5hd2_cpu_die(unsigned int cpu);
 
 extern void hip01_set_cpu(int cpu, bool enable);
-extern void hip01_cpu_die(unsigned int cpu);
 #endif