Remove unused Zone argument from InitializeAstVisitor

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-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, Zone* zone, FunctionLiteral* root);
+  TypingReseter(Isolate* isolate, FunctionLiteral* root);
 
  protected:
   void VisitExpression(Expression* expression) override;
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TYPING_RESET_H_