Can I delete simple:forum directory leftovers?

I just un-installed and deleted simple:forum from my site but my "/public_html/luchotv.com/wp-content" directory still have 8 forum directories (forum-avatar-pool, forum-avatars, forum-badges, forum-file-uploads, forum-media-uploads, forum-policies and forum-smileys).

Can I delete these directories?

Thank you for your help,
Luciano