Update src/iceberg/expression/expression_visitor.h

Co-authored-by: Zehua Zou <[email protected]>

Author: wgtmac

src/iceberg/expression/expression_visitor.h

@@ -262,10 +262,6 @@ class ICEBERG_EXPORT BoundVisitor : public ExpressionVisitor<R> {
 /// \param expr The expression to traverse
 /// \param visitor The visitor to use for traversal
 /// \return The result produced by the visitor for the root expression node
-template <typename R, typename V>
-  requires std::derived_from<V, ExpressionVisitor<R>>
-Result<R> Visit(const std::shared_ptr<Expression>& expr, V& visitor);
-
 template <typename R, typename V>
   requires std::derived_from<V, ExpressionVisitor<R>>
 Result<R> Visit(const std::shared_ptr<Expression>& expr, V& visitor) {