message: Removed spammy log message from the FrameBuffer.
  Inserting old frames is not an error condition and should not print a warning, and given that it happens all the time it is also very spammy.
  Cr-Commit-Position: refs/heads/master@{#31172}
diff: @@ -491,10 +491,6 @@ int64_t FrameBuffer::InsertFrame(std::unique_ptr<EncodedFrame> frame) {
  auto info = frames_.emplace(id, FrameInfo()).first;
  if (info->second.frame) {
  - RTC_LOG(LS_WARNING) << "Frame with (picture_id:spatial_id) ("
  - << id.picture_id << ":"
  - << static_cast<int>(id.spatial_layer)
  - << ") already inserted, dropping frame.";
  return last_continuous_picture_id;
  }
  