message: remove obsolete internal method
diff: @@ -790,12 +790,7 @@ class Builder {
  uint8_t* addInternal(StringRef const& attrName, uint64_t tag, T const& sub) {
  return addInternal<T>(attrName.data(), attrName.size(), tag, sub);
  }
  -/*
  - template <typename T>
  - uint8_t* addInternal(char const* attrName, uint64_t tag, T const& sub) {
  - return addInternal<T>(attrName, strlen(attrName), tag, sub);
  - }
  -*/
  +
  template <typename T>
  uint8_t* addInternal(char const* attrName, std::size_t attrLength, uint64_t tag, T const& sub) {
  bool haveReported = false;
  