Revert of [cherrypick] Fix computation of runtime for throttled tasks

components/scheduler/base/virtual_time_domain.cc

Index: components/scheduler/base/virtual_time_domain.cc
diff --git a/components/scheduler/base/virtual_time_domain.cc b/components/scheduler/base/virtual_time_domain.cc
index 97c63da5cdaba218d07f2acd5e69ca7d36ff2cab..0abea9493c342d8a478fa69a2477a442d573070d 100644
--- a/components/scheduler/base/virtual_time_domain.cc
+++ b/components/scheduler/base/virtual_time_domain.cc
@@ -26,12 +26,6 @@
 LazyNow VirtualTimeDomain::CreateLazyNow() {
   base::AutoLock lock(lock_);
   return LazyNow(now_);
-}
-
-base::TimeTicks VirtualTimeDomain::ComputeDelayedRunTime(
-    base::TimeTicks time_domain_now,
-    base::TimeDelta delay) const {
-  return time_domain_now + delay;
 }
 
 void VirtualTimeDomain::RequestWakeup(LazyNow* lazy_now,