cros_bundle_firmware: don't add u-boot.dtb to CBFS

It's unused.

BUG=chromium:595715
BRANCH=none
TEST=none

Change-Id: If83ea687fda2c276cd802da052de18cba54dce74
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://chromium-review.googlesource.com/414345
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
diff --git a/host/lib/bundle_firmware.py b/host/lib/bundle_firmware.py
index 48e635b..2e5f96d 100644
--- a/host/lib/bundle_firmware.py
+++ b/host/lib/bundle_firmware.py
@@ -659,8 +659,6 @@
       self._tools.Run('cbfstool', [bootstub, 'add-flat-binary', '-f',
           uboot_dtb, '-n', 'fallback/payload', '-c', 'lzma',
           '-l', '%#x' % text_base, '-e', '%#x' % entry])
-    self._tools.Run('cbfstool', [bootstub, 'add', '-f', fdt.fname,
-        '-n', 'u-boot.dtb', '-t', '0xac'])
 
     # Create a coreboot copy to use as a scratch pad.
     cb_copy = os.path.abspath(os.path.join(self._tools.outdir, 'cb_with_fmap'))