powerpc: ppc4xx: remove board support for KAREF and METROBOX

These boards have been orphaned for more than 6 months.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/doc/README.scrapyard b/doc/README.scrapyard
index 2f5034f..92ba1e4 100644
--- a/doc/README.scrapyard
+++ b/doc/README.scrapyard
@@ -12,6 +12,8 @@
 
 Board            Arch        CPU            Commit      Removed     Last known maintainer/contact
 =================================================================================================
+KAREF            powerpc     ppc4xx         -           -           Travis Sawyer <travis.sawyer@sandburst.com>
+METROBOX         powerpc     ppc4xx         -           -           Travis Sawyer <travis.sawyer@sandburst.com>
 PK1C20           nios2       -              70fbc461    2014-08-24  Scott McNutt <smcnutt@psyent.com>
 PCI5441          nios2       -              70fbc461    2014-08-24  Scott McNutt <smcnutt@psyent.com>
 flagadm          powerpc     mpc8xx         aec6f8c5    2014-08-22  Kári Davíðsson <kd@flaga.is>