PM: runtime: Remove unsued extern declaration of pm_runtime_update_max_time_suspended()

Commit 76e267d ("PM / Runtime: Remove device fields related to
suspend time, v2") left behind this.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: YueHaibing

include/linux/pm_runtime.h

@@ -85,8 +85,6 @@ extern void pm_runtime_irq_safe(struct device *dev);
 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
 extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
-extern void pm_runtime_update_max_time_suspended(struct device *dev,
-						 s64 delta_ns);
 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
 extern void pm_runtime_get_suppliers(struct device *dev);
 extern void pm_runtime_put_suppliers(struct device *dev);