Media converter file action queue entries remove directory

[pilot830]

When a video is deleted, or expires, in the file action queue, it adds an entry in there to remove the thumbnail for the video -- makes sense

the entry it tries to remove is core/cache/plugins/mediaconverter/[file_id]/original_thumb.jpg

but it does not remove the actual directory for [file_id] core/cache/plugins/mediaconverter/[file_id]/

so i request for the directory to be removed as well