Remove unused Zone argument from InitializeAstVisitor

src/typing-asm.h

Index: src/typing-asm.h
diff --git a/src/typing-asm.h b/src/typing-asm.h
index 26ce65a6a8f6331d100de7df8be7d8016f4d6016..a6348c9f6ecee0fa1c20cf1023a8a5e7623e2225 100644
--- a/src/typing-asm.h
+++ b/src/typing-asm.h
@@ -27,6 +27,7 @@ class AsmTyper : public AstVisitor {
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
 
  private:
+  Zone* zone_;
   Script* script_;
   FunctionLiteral* root_;
   bool valid_;
@@ -83,6 +84,8 @@ class AsmTyper : public AstVisitor {
   void VisitWithExpectation(Expression* expr, Type* expected_type,
                             const char* msg);
 
+  Zone* zone() const { return zone_; }
+
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node) override;
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT