[heap] Remove store buffer top from roots

src/snapshot/startup-serializer.cc

Index: src/snapshot/startup-serializer.cc
diff --git a/src/snapshot/startup-serializer.cc b/src/snapshot/startup-serializer.cc
index 86b0f833c1e147f0553203413a68f1e26906dc72..4d87c59115c439ebb6642c8e3832f0c505fdd87a 100644
--- a/src/snapshot/startup-serializer.cc
+++ b/src/snapshot/startup-serializer.cc
@@ -150,8 +150,7 @@ void StartupSerializer::VisitPointers(Object** start, Object** end) {
 }
 
 bool StartupSerializer::RootShouldBeSkipped(int root_index) {
-  if (root_index == Heap::kStoreBufferTopRootIndex ||
-      root_index == Heap::kStackLimitRootIndex ||
+  if (root_index == Heap::kStackLimitRootIndex ||
       root_index == Heap::kRealStackLimitRootIndex) {
     return true;
   }