[turbofan] Remove obsolete frame state before comparison.

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index be6c358617b782a0188170f2e96311db6621cc51..138b7b65091002ba44425d5f9b64c38bb0fd986d 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -2904,11 +2904,10 @@ void AstGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
   }
   VisitForValue(expr->left());
   VisitForValue(expr->right());
-  FrameStateBeforeAndAfter states(this, expr->right()->id());
   Node* right = environment()->Pop();
   Node* left = environment()->Pop();
   Node* value = NewNode(op, left, right);
-  states.AddToNode(value, expr->id(), ast_context()->GetStateCombine());
+  PrepareFrameState(value, expr->id(), ast_context()->GetStateCombine());
   ast_context()->ProduceValue(expr, value);
 }