Revert "[turbofan] Add new JSFrameSpecialization reducer."

src/compiler/js-frame-specialization.h

Index: src/compiler/js-frame-specialization.h
diff --git a/src/compiler/js-frame-specialization.h b/src/compiler/js-frame-specialization.h
deleted file mode 100644
index c6fc561c5cfe479711b9bc182d8f45512e6a25b5..0000000000000000000000000000000000000000
--- a/src/compiler/js-frame-specialization.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef V8_COMPILER_JS_FRAME_SPECIALIZATION_H_
-#define V8_COMPILER_JS_FRAME_SPECIALIZATION_H_
-
-#include "src/compiler/graph-reducer.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-// Forward declarations.
-class JSGraph;
-
-
-class JSFrameSpecialization final : public Reducer {
- public:
-  JSFrameSpecialization(JavaScriptFrame const* frame, JSGraph* jsgraph)
-      : frame_(frame), jsgraph_(jsgraph) {}
-  ~JSFrameSpecialization() final {}
-
-  Reduction Reduce(Node* node) final;
-
- private:
-  Reduction ReduceOsrValue(Node* node);
-  Reduction ReduceParameter(Node* node);
-
-  Isolate* isolate() const;
-  JavaScriptFrame const* frame() const { return frame_; }
-  JSGraph* jsgraph() const { return jsgraph_; }
-
-  JavaScriptFrame const* const frame_;
-  JSGraph* const jsgraph_;
-
-  DISALLOW_COPY_AND_ASSIGN(JSFrameSpecialization);
-};
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_COMPILER_JS_FRAME_SPECIALIZATION_H_