message: Remove usage of a preprocessor macro that is never defined.
diff: @@ -179,11 +179,8 @@ std::string HexEncode(absl::string_view bytes) {
  return res;
  }
  -#if defined(PLATFORM_GOOGLE)
  -string TmpDir() { return FLAGS_test_tmpdir; }
  -#else
  std::string TmpDir() {
  - // 'bazel test' sets TEST_TMPDIR
  + // The Bazel 'test' command sets TEST_TMPDIR.
  const char* env = getenv("TEST_TMPDIR");
  if (env && env[0] != '\0') {
  return env;
  @@ -194,7 +191,6 @@ std::string TmpDir() {
  }
  return "/tmp";
  }
  -#endif
  void AddKeyData(
  const google::crypto::tink::KeyData& key_data,
  