[gentoo-user] Cleaning out /etc/portage easily??

[Dale]

Howdy,

I suspect there may be more people than me wondering about this one.  I
have quite a few entries in /etc/portage files, especially keywords. 
I'd like to know if there is a tool that deletes no longer needed
entries itself.  I been using eix-test-obsolete but doing it manually
can take quite a while.  Is there a tool that I can run and it clean out
those files itself instead of me doing it one line at a time?  I figure
there has to be someone out there that has already done this, surely. 

Anyone have any info on such a beast? 

Thanks much.

Dale

:-)  :-)