cppgc: Remove redundant TODOs

Bug: chromium:1056170
Change-Id: Ia5a507b462498b4e10722a7052a19a41ad7e41ef
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2897088
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74584}

src/heap/cppgc-js/cpp-heap.cc

@@ -328,10 +328,6 @@ void CppHeap::TracePrologue(TraceFlags flags) {
 }
 
 bool CppHeap::AdvanceTracing(double deadline_in_ms) {
-  // TODO(chromium:1154636): The kAtomicMark/kIncrementalMark scope below is
-  // needed for recording all cpp marking time. Note that it can lead to double
-  // accounting since this scope is also accounted under an outer v8 scope.
-  // Make sure to only account this scope once.
   cppgc::internal::StatsCollector::EnabledScope stats_scope(
       stats_collector(),
       in_atomic_pause_ ? cppgc::internal::StatsCollector::kAtomicMark

src/heap/cppgc/visitor.cc

@@ -52,8 +52,6 @@ void TraceConservatively(ConservativeTracingVisitor* conservative_visitor,
 
 void ConservativeTracingVisitor::TraceConservativelyIfNeeded(
     const void* address) {
-  // TODO(chromium:1056170): Add page bloom filter
-
   const BasePage* page = reinterpret_cast<const BasePage*>(
       page_backend_.Lookup(static_cast<ConstAddress>(address)));