taepper opened a new pull request, #50714: URL: https://github.com/apache/arrow/pull/50714
### Rationale for this change This is the first part of simplifying functional helpers which are no longer required since the code-base supports more recent C++ versions. (See #50713 and #50250) ### What changes are included in this PR? This removes the `return_type` related helpers from `functional.h`. Also, the unused helpers `is_overloaded`, `enable_if_empty` and `enable_if_not_empty` are removed. ### Are these changes tested? Yes ### Are there any user-facing changes? No -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
