Remove TypingResetter.

src/typing-reset.h

-// 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_TYPING_RESET_H_
-#define V8_TYPING_RESET_H_
-
-#include "src/ast/ast-expression-visitor.h"
-
-namespace v8 {
-namespace internal {
-
-// A Visitor over a CompilationInfo's AST that resets
-// typing bounds back to their default.
-
-class TypingReseter : public AstExpressionVisitor {
- public:
-  TypingReseter(Isolate* isolate, FunctionLiteral* root);
-
- protected:
-  void VisitExpression(Expression* expression) override;
-};
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_TYPING_RESET_H_