Remove Obsolete Comment from https://codereview.chromium.org/2729573004/

base/task_scheduler/scheduler_worker_pool_impl_unittest.cc

Index: base/task_scheduler/scheduler_worker_pool_impl_unittest.cc
diff --git a/base/task_scheduler/scheduler_worker_pool_impl_unittest.cc b/base/task_scheduler/scheduler_worker_pool_impl_unittest.cc
index f3b1bedf0ef30a3a2b6f168fc86256e816aed69d..d24775f0c0d73e2c49889e7033d03e45e878f05f 100644
--- a/base/task_scheduler/scheduler_worker_pool_impl_unittest.cc
+++ b/base/task_scheduler/scheduler_worker_pool_impl_unittest.cc
@@ -598,7 +598,6 @@ TEST_F(TaskSchedulerWorkerPoolHistogramTest, NumTasksBetweenWaitsWithDetach) {
   worker_pool_->DisallowWorkerDetachmentForTesting();
 }
 
-// TODO(crbug.com/698046): disabled due to flakyness.
 TEST_F(TaskSchedulerWorkerPoolHistogramTest, NumTasksBeforeDetach) {
   InitializeWorkerPool(kReclaimTimeForDetachTests, kNumWorkersInWorkerPool);