[turbofan] Add a Simplified::CheckMaps instruction.

src/compiler/js-type-feedback.h

Index: src/compiler/js-type-feedback.h
diff --git a/src/compiler/js-type-feedback.h b/src/compiler/js-type-feedback.h
index 17a6b588a4f3af52883908479f4ad511801ba139..dd3e2d85d5face5a5342643222c8e95c96a498c4 100644
--- a/src/compiler/js-type-feedback.h
+++ b/src/compiler/js-type-feedback.h
@@ -100,9 +100,6 @@ class JSTypeFeedbackSpecializer : public AdvancedReducer {
   CommonOperatorBuilder* common() { return jsgraph_->common(); }
   SimplifiedOperatorBuilder* simplified() { return &simplified_; }
 
-  void BuildMapCheck(Node* receiver, Handle<Map> map, bool smi_check,
-                     Node* effect, Node* control, Node** success, Node** fail);
-
   Node* GetFrameStateBefore(Node* node);
 };