message: toolkit: Fix warnings in burstbuffer
  Remove an unreachable statement and an unused variable.
diff: @@ -242,7 +242,6 @@ std::pair<size_t, double> FileDrainer::Read(InputFile &f, size_t count,
  " offset = " + std::to_string(currentOffset) +
  " count = " + std::to_string(count) + " bytes but only " +
  std::to_string(totalRead + readSize) + ".\n");
  - break;
  }
  }
  buffer += readSize;
  @@ -255,7 +254,6 @@ std::pair<size_t, double> FileDrainer::Read(InputFile &f, size_t count,
  size_t FileDrainer::Write(OutputFile &f, size_t count, const char *buffer,
  const std::string &path)
  {
  - size_t totalWritten = 0;
  f->write(buffer, static_cast<std::streamsize>(count));
  if (f->bad())
  