[POWERPC] Remove dtc build cruft from DTS files

The patch below removes the dtc incantation instructions from the
in-kernel DTS files.  It's not needed, and is prone to being
out-of-date most of the time.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>

arch/powerpc/boot/dts/ebony.dts

@@ -9,10 +9,6 @@
  * This file is licensed under the terms of the GNU General Public
  * License version 2.  This program is licensed "as is" without
  * any warranty of any kind, whether express or implied.
- *
- * To build:
- *   dtc -I dts -O asm -o ebony.S -b 0 ebony.dts
- *   dtc -I dts -O dtb -o ebony.dtb -b 0 ebony.dts
  */
 
 / {