DepClean

emerge -ac

 * Always study the list of packages to be cleaned for any obvious
 * mistakes. Packages that are part of the world set will always
 * be kept.  They can be manually added to this set with
 * `emerge --noreplace <atom>`.  Packages that are listed in
 * package.provided (see portage(5)) will be removed by
 * depclean, even if they are part of the world set.
 *
 * As a safety measure, depclean will not remove any packages
 * unless *all* required dependencies have been resolved.  As a
 * consequence, it is often necessary to run `emerge --update
 * --newuse --deep @world` prior to depclean.

Calculating dependencies... done!
>>> Calculating removal order...

>>> These are the packages that would be unmerged:

 sys-kernel/gentoo-sources
    selected: 3.5.4
   protected: none
     omitted: 3.3.8 3.6.0

 media-libs/fontconfig-infinality
    selected: 20120619
   protected: none
     omitted: none

 sys-fs/udisks
    selected: 1.98.0
   protected: none
     omitted: 1.0.4-r2

 sys-fs/cryptsetup
    selected: 1.4.3
   protected: none
     omitted: none

 media-fonts/croscorefonts
    selected: 1.21.0
   protected: none
     omitted: none

 app-admin/eselect-infinality
    selected: 1
   protected: none
     omitted: none

 app-admin/eselect-lcdfilter
    selected: 1
   protected: none
     omitted: none