I want to automatically delete the data posted by the user after a certain period of time.

We are creating SNS sites where users like Twitter can post.
Specifically, the Ruby on Rails Tutorial sample application has just been completed, and we are now trying to add functionality.
I would like to implement a function that automatically deletes data after a certain period of time (30 minutes) after the user posts it.

I tried using whenever and expires_in, but I couldn't erase it because I didn't know how to write it.

In the case of whenever, how should I write it on schedule.rb?
Also, if there is any other way, please let me know.

I apologize for the inconvenience, but I would appreciate it if you could reply.