In order to do this you would need to set up a cron task https://codex.wordpress.org/Category:WP-Cron_Functions. In your cron you would need to get all of the posts, or whatever it is that this repeater is related to. The loop over this and check the row values and then use update_field() https://www.advancedcustomfields.com/resources/update_field/ or possibly delete_row https://www.advancedcustomfields.com/resources/delete_row/ to get rid of the ones you don’t want.
Alternately, instead of using a cron you might be able to do this work inside of an acf/save_post filter https://www.advancedcustomfields.com/resources/acf-save_post/, but this would only update the values for a post when it is updated.
