message: Reuse iterator when erasing callbacks.
  Summary: Doing an extra lookup here is wasteful.
diff: @@ -2084,8 +2084,12 @@ void QuicTransportBase::checkForClosedStream() {
  stream->holbCount);
  conn_->streamManager->removeClosedStream(*itr);
  maybeSendStreamLimitUpdates(*conn_);
  - readCallbacks_.erase(*itr);
  - peekCallbacks_.erase(*itr);
  + if (readCbIt != readCallbacks_.end()) {
  + readCallbacks_.erase(readCbIt);
  + }
  + if (peekCbIt != peekCallbacks_.end()) {
  + peekCallbacks_.erase(peekCbIt);
  + }
  itr = conn_->streamManager->closedStreams().erase(itr);
  } // while
  