diff --git a/SimDataFormats/Associations/src/classes.h b/SimDataFormats/Associations/src/classes.h
index 27e6e663386fd..c888c0543b285 100644
--- a/SimDataFormats/Associations/src/classes.h
+++ b/SimDataFormats/Associations/src/classes.h
@@ -19,48 +19,3 @@
 #include "SimDataFormats/Associations/interface/MtdSimLayerClusterToRecoClusterAssociationMap.h"
 #include "SimDataFormats/Associations/interface/MtdRecoClusterToSimLayerClusterAssociator.h"
 #include "SimDataFormats/Associations/interface/MtdSimLayerClusterToTPAssociator.h"
-
-struct SimDataFormats_Associations {
-  // add 'dummy' Wrapper variable for each class type you put into the Event
-  edm::Wrapper<reco::TrackToTrackingParticleAssociator> dummy1;
-  edm::Wrapper<reco::TrackToGenParticleAssociator> dummy2;
-  edm::Wrapper<reco::MuonToTrackingParticleAssociator> dummy3;
-
-  edm::Wrapper<reco::VertexToTrackingVertexAssociator> dummy4;
-
-  edm::Wrapper<hgcal::LayerClusterToCaloParticleAssociator> dummy5;
-
-  edm::Wrapper<hgcal::LayerClusterToSimClusterAssociator> dummy6;
-
-  edm::Wrapper<hgcal::TracksterToSimClusterAssociator> dummy7;
-
-  edm::Wrapper<hgcal::MultiClusterToCaloParticleAssociator> dummy8;
-
-  edm::Wrapper<hgcal::TracksterToSimTracksterAssociator> dummy9;
-
-  edm::Wrapper<hgcal::TracksterToSimTracksterHitLCAssociator> dummy10;
-
-  edm::Wrapper<hgcal::LayerClusterToSimTracksterAssociator> dummy11;
-
-  edm::Wrapper<reco::MtdRecoClusterToSimLayerClusterAssociator> dummy12;
-
-  reco::VertexSimToRecoCollection vstrc;
-  reco::VertexSimToRecoCollection::const_iterator vstrci;
-  edm::Wrapper<reco::VertexSimToRecoCollection> wvstrc;
-
-  reco::VertexRecoToSimCollection vrtsc;
-  reco::VertexRecoToSimCollection::const_iterator vrtsci;
-  edm::Wrapper<reco::VertexRecoToSimCollection> wvrtsci;
-
-  std::pair<FTLClusterRef, std::vector<MtdSimLayerClusterRef>> dummy13;
-  edm::Wrapper<std::pair<FTLClusterRef, std::vector<MtdSimLayerClusterRef>>> dummy14;
-  MtdRecoClusterToSimLayerClusterAssociationMap dummy15;
-  edm::Wrapper<MtdRecoClusterToSimLayerClusterAssociationMap> dummy16;
-
-  std::pair<MtdSimLayerClusterRef, std::vector<FTLClusterRef>> dummy17;
-  edm::Wrapper<std::pair<MtdSimLayerClusterRef, std::vector<FTLClusterRef>>> dummy18;
-  MtdSimLayerClusterToRecoClusterAssociationMap dummy19;
-  edm::Wrapper<MtdSimLayerClusterToRecoClusterAssociationMap> dummy20;
-
-  edm::Wrapper<reco::MtdSimLayerClusterToTPAssociator> dummy21;
-};