Remove some unused code that fails to compile with -Wundef

src/trusted/service_runtime/fs/xdr.c

Index: src/trusted/service_runtime/fs/xdr.c
diff --git a/src/trusted/service_runtime/fs/xdr.c b/src/trusted/service_runtime/fs/xdr.c
deleted file mode 100644
index 85aa7ef4c22871dc47052ed85295975500fe186b..0000000000000000000000000000000000000000
--- a/src/trusted/service_runtime/fs/xdr.c
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright 2008 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can
- * be found in the LICENSE file.
- */
-
-/*
- * NaCl file system mini XDR-like serialization of basic file system types.
- */
-#include "native_client/src/shared/platform/nacl_log.h"
-
-#include "native_client/src/trusted/service_runtime/include/machine/_types.h"
-#include "native_client/src/trusted/service_runtime/fs/fs.h"
-#include "native_client/src/trusted/service_runtime/fs/xdr.h"
-
-/*
- * XDR externalization / internalization code for larger data types
- * for which the encoder/decoder should not be inlined.
- */
-
-/* macro used in all externalization/internalization functions */
-#define Ext(T, mem) do {                          \
-    bump += nacl_ext_ ## T(buf + bump, dp->mem);  \
-  } while (0)
-
-#define Int(T, mem) do {                          \
-    bump += nacl_int_ ## T(buf + bump, &dp->mem); \
-  } while (0)
-
-#define S(T, mem) do { bump += sizeof(T); } while (0)
-
-#define G(Tag, Macro) \
-  size_t NaCl ## Macro ## Tag(char *buf, struct Tag *dp) { \
-    size_t bump = 0;                                       \
-    Macro(dev_t, dev);                                     \
-    Macro(ino_t, ino);                                     \
-    Macro(mode_t, mode);                                   \
-    Macro(uid_t, uid);                                     \
-    Macro(gid_t, gid);                                     \
-    Macro(nlink_t, nlink);                                 \
-    Macro(off_t, size);                                    \
-    Macro(time_t, atime);                                  \
-    Macro(time_t, mtime);                                  \
-    Macro(time_t, ctime);                                  \
-                                                           \
-    return bump;                                           \
-  }
-
-#define F(StructTag) G(StructTag, Ext) G(StructTag, Int)
-
-F(NaClFileAttr)
-
-#undef F
-#undef G