media_buttons_context deprecated

Hi!
I have a persistent error in my log for a usage of media_buttons_context which has been deprecated since 3.5!
Because of another error I decided to try and locate the user.
Although your plug-in was switched of I still found it in recent-related-post-and-page.php on line 364:
add_action( ‘media_buttons_context’, ‘weblizar_rp_rp_add_rpg_custom_button’ );

According to the error you should use media_buttons in stead.