Remove some unused code that fails to compile with -Wundef

src/trusted/service_runtime/service_runtime.gyp

Index: src/trusted/service_runtime/service_runtime.gyp
diff --git a/src/trusted/service_runtime/service_runtime.gyp b/src/trusted/service_runtime/service_runtime.gyp
index 794328d17bcf182f8bf6ef59daadf0ee45061a83..1b384f4e7260c510e8d929c966c4c3911dd0aea8 100644
--- a/src/trusted/service_runtime/service_runtime.gyp
+++ b/src/trusted/service_runtime/service_runtime.gyp
@@ -264,13 +264,6 @@
         'generic_container/container.c',
       ],
     }, {
-      'target_name': 'nacl_xdr',
-      'type': 'static_library',
-      'sources': [
-        'fs/xdr.c',
-        'fs/obj_proxy.c',
-      ],
-    }, {
       'target_name': 'nacl_error_code',
       'type': 'static_library',
       'sources': [
@@ -357,16 +350,6 @@
           'sources': [
             'generic_container/container.c',
           ],
-        }, {
-          'target_name': 'nacl_xdr64',
-          'type': 'static_library',
-          'variables': {
-            'win_target': 'x64',
-          },
-          'sources': [
-            'fs/xdr.c',
-            'fs/obj_proxy.c',
-          ],
         },
         {
           'target_name': 'nacl_error_code64',