bvb_refimpl: Remove unused internal header file.

This file was errornously introduced in the previous commit.

BUG=None
TEST=Code builds and unit tests pass.

Change-Id: Iaf4d431b3c73ee9031957d26e8549607a98463ea
diff --git a/README b/README
index d98e32a..f146540 100644
--- a/README
+++ b/README
@@ -30,10 +30,6 @@
 
    Various utility code.
 
- bvb_util_internal.h
-
-   Utility code used by bvb internals.
-
  bvb_sysdeps.h
 
    Declarations of system dependencies expected to be provided by the
diff --git a/bvb_rsa.c b/bvb_rsa.c
index e569d81..50517b8 100644
--- a/bvb_rsa.c
+++ b/bvb_rsa.c
@@ -27,7 +27,6 @@
 #include "bvb_rsa.h"
 #include "bvb_sha.h"
 #include "bvb_util.h"
-#include "bvb_util_internal.h"
 
 typedef struct Key {
   unsigned int len;  /* Length of n[] in number of uint32_t */
diff --git a/bvb_util_internal.h b/bvb_util_internal.h
deleted file mode 100644
index 63d1193..0000000
--- a/bvb_util_internal.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-#ifndef BVB_REFIMPL_COMPILATION
-#error "Never include this file, it may only be used from internal bvb code."
-#endif
-
-#ifndef BVB_UTIL_INTERNAL_H_
-#define BVB_UTIL_INTERNAL_H_
-
-#include "bvb_rsa.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Copies |header| to |dest|, byte-swapping fields in the process. */
-void bvb_rsa_public_key_header_to_host_byte_order(
-    const BvbRSAPublicKeyHeader* src,
-    BvbRSAPublicKeyHeader* dest);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  /* BVB_UTIL_INTERNAL_H_ */
diff --git a/bvb_util_unittest.cc b/bvb_util_unittest.cc
index 890158f..4ef9955 100644
--- a/bvb_util_unittest.cc
+++ b/bvb_util_unittest.cc
@@ -20,9 +20,6 @@
 
 #include "bvb_refimpl.h"
 
-#define BVB_REFIMPL_COMPILATION
-#include "bvb_util_internal.h"
-
 TEST(UtilTest, BootImageHeaderByteswap)
 {
   BvbBootImageHeader h;