Deleting /usr/X11R6 and /etc/X11

[Mark Edwards]

I decided to remove XFree86 from my server since I don't really use it 
and its just taking up space.  So I removed all gui ports, including 
all of gnome and XFree86.  Done.  Now, I'm wondering if there is any 
reason I shouldn't just delete /usr/X11R6 and /etc/X11?  Aren't they 
just taking up space?

Are those directories part of the a base FreeBSD 4.x install?

Are there other X11-related directories that I could wipe as well?

Thanks!