You should use the CSS code for this purpose. Something like this: 

.wpf-stat-item:nth-child(4), .wpf-stat-item:nth-child(5) {
   display: none !important;
}
/* Use this code to center elements  */
#wpforo #wpforo-wrap #wpforo-stat-body .wpf-stat-data {
   display: flex;
   justify-content: space-between;
}

Don't forget to delete all caches before checking.