This setup was used for amd64 and powerpc before they reached the point

where a normal buildworld would succeed.  It is no longer required.

tools/tools/tinderbox/etc/Makefile

@@ -1,7 +1,7 @@
 # $FreeBSD$
 
 ETCFILES	 = default.rc releng_4.rc releng_5.rc current.rc
-ETCFILES	+= ada.rc dsa.rc dwp.rc experimental.rc
+ETCFILES	+= ada.rc dsa.rc dwp.rc
 ETCDIR		?= ${HOME}/etc
 ETCOWN		?= ${USER}
 ETCGRP		?= ${USER}

tools/tools/tinderbox/etc/experimental.rc

@@ -1,12 +0,0 @@
-#
-# Tinderbox setup for experimental platforms.
-#
-# $FreeBSD$
-#
-
-comment		= Experimental platforms
-branches	= CURRENT
-platforms	= powerpc
-options		= --verbose, --verbose
-targets		= clean, update, patch, world, generic, lint
-patch		= %%arch%%.diff