message: remove obsolete function
diff: @@ -403,16 +403,6 @@ double AliMultDepSpecAnalysisTask::GetParticleWeight(AliVParticle* particle)
  return 1.0;
  }
  -// helper function to reject events containing only background
  -bool IsBackgroundEvent(AliVEvent* event) {
  - AliVTrack* track = nullptr;
  - for (int i = 0; i < event->GetNumberOfTracks(); ++i) {
  - track = dynamic_cast<AliVTrack*>(event->GetTrack(i));
  - if (std::abs(track->GetLabel()) < AliMCEvent::BgLabelOffset()) return false;
  - }
  - return true;
  -}
  -
  //**************************************************************************************************
  /**
  * Initialize event quantities. Sets fEvent, fMCEvent, fMeasMult, fTrueMult
  @@ -435,9 +425,7 @@ bool AliMultDepSpecAnalysisTask::InitEvent()
  AliError("fMCEvent not available\n");
  return false;
  }
  - if(fIsNewReco && IsBackgroundEvent(fEvent)) {
  - return false;
  - }
  +
  fMCVtxZ = fMCEvent->GetPrimaryVertex()->GetZ();
  if (fMCEnableDDC) {
  