remove unnecessary include from layout.c

BUG=none
BRANCH=NONE
TEST=Build inside and outside cros_sdk, with CONFIG_FDTMAP enabled
and disabled.

Change-Id: I3b2eba9bba3693b5675c9e7c8246d798e66c96de
Signed-off-by: Martin Roth <martinroth@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/469066
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/layout.c b/layout.c
index 369d8c8..fbe4835 100644
--- a/layout.c
+++ b/layout.c
@@ -29,7 +29,6 @@
 #include "flash.h"
 #include "fdtmap.h"
 #include "fmap.h"
-#include "libfdt.h"
 #include "layout.h"
 #include "programmer.h"
 #include "search.h"