You have given the wrong actions name. see more information here
Change this line
`add_action('wp_ajax_worktmp_delete_absence', 'delete_data');`
With this
`add_action('wp_ajax_delete_data', 'delete_data');`
You have given the wrong actions name. see more information here
Change this line
`add_action('wp_ajax_worktmp_delete_absence', 'delete_data');`
With this
`add_action('wp_ajax_delete_data', 'delete_data');`