powerpc: Kill flatdevtree_env.h too

Commit 430b01e8 ("[POWERPC] Kill
flatdevtree.c") killed the two files including flatdevtree_env.h. It was
apparently just an oversight to not kill that header too. Kill it now.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/boot/flatdevtree_env.h

-/*
- * This file adds the header file glue so that the shared files
- * flatdevicetree.[ch] can compile and work in the powerpc bootwrapper.
- *
- * strncmp & strchr copied from <file:lib/string.c>
- * Copyright (C) 1991, 1992  Linus Torvalds
- *
- * Maintained by: Mark A. Greer <mgreer@mvista.com>
- */
-#ifndef _PPC_BOOT_FLATDEVTREE_ENV_H_
-#define _PPC_BOOT_FLATDEVTREE_ENV_H_
-
-#include <stdarg.h>
-#include <stddef.h>
-#include "types.h"
-#include "string.h"
-#include "stdio.h"
-#include "ops.h"
-
-#define be16_to_cpu(x)		(x)
-#define cpu_to_be16(x)		(x)
-#define be32_to_cpu(x)		(x)
-#define cpu_to_be32(x)		(x)
-#define be64_to_cpu(x)		(x)
-#define cpu_to_be64(x)		(x)
-
-#endif /* _PPC_BOOT_FLATDEVTREE_ENV_H_ */