Remove SchedulerWorkerPoolImpl::ReEnqueueSequenceCallback.

base/task_scheduler/task_scheduler_impl.h

Index: base/task_scheduler/task_scheduler_impl.h
diff --git a/base/task_scheduler/task_scheduler_impl.h b/base/task_scheduler/task_scheduler_impl.h
index 342d5df429889dbf5fccb0d7f828405141c0d8c3..07829609c2a63ae5bafe0133b591d7c2cf23d251 100644
--- a/base/task_scheduler/task_scheduler_impl.h
+++ b/base/task_scheduler/task_scheduler_impl.h
@@ -78,10 +78,6 @@ class BASE_EXPORT TaskSchedulerImpl : public TaskScheduler {
   SchedulerWorkerPoolImpl* GetWorkerPoolForTraits(
       const TaskTraits& traits) const;
 
-  // Callback invoked when a non-single-thread |sequence| isn't empty after a
-  // worker pops a Task from it.
-  void ReEnqueueSequenceCallback(scoped_refptr<Sequence> sequence);
-
   const std::string name_;
   Thread service_thread_;
   std::unique_ptr<TaskTracker> task_tracker_;