[turbofan] Remove dead JSTypedLowering::EmptyFrameState.

src/compiler/js-typed-lowering.cc

Index: src/compiler/js-typed-lowering.cc
diff --git a/src/compiler/js-typed-lowering.cc b/src/compiler/js-typed-lowering.cc
index 1b0bdf80ebba6675ae5a0cc1858581de9c53c1e3..acec322d0e0f8392728e2064ba1ec8287d1c3630 100644
--- a/src/compiler/js-typed-lowering.cc
+++ b/src/compiler/js-typed-lowering.cc
@@ -2125,14 +2125,6 @@ Reduction JSTypedLowering::Reduce(Node* node) {
   return NoChange();
 }
 
-Node* JSTypedLowering::EmptyFrameState() {
-  return graph()->NewNode(
-      common()->FrameState(BailoutId::None(), OutputFrameStateCombine::Ignore(),
-                           nullptr),
-      jsgraph()->EmptyStateValues(), jsgraph()->EmptyStateValues(),
-      jsgraph()->EmptyStateValues(), jsgraph()->NoContextConstant(),
-      jsgraph()->UndefinedConstant(), graph()->start());
-}
 
 Factory* JSTypedLowering::factory() const { return jsgraph()->factory(); }