diff --git a/TrackingTools/TrajectoryState/src/classes_def.xml b/TrackingTools/TrajectoryState/src/classes_def.xml
index b6a3e9b03f813..86d28dbef393d 100755
--- a/TrackingTools/TrajectoryState/src/classes_def.xml
+++ b/TrackingTools/TrajectoryState/src/classes_def.xml
@@ -1,23 +1,8 @@
 <lcgdict>
-  <!-- not needed
-  <class name="TrackParamConstraint"/>
-  -->
-
   <!-- persistent="false" qualifier for non-wrappers is deprecated. Will be removed when no longer needed.-->
   <class name="std::vector<TrackParamConstraint>" persistent="false"/>
   <class name="edm::Wrapper<std::vector<TrackParamConstraint> >" persistent="false"/>
-
-  <!-- not needed
-  <class name="edm::RefProd<std::vector<TrackParamConstraint> >"/>
-  -->
-
   <class name="edm::AssociationMap<edm::OneToOne<reco::TrackCollection,std::vector<TrackParamConstraint>, unsigned int> >" >
     <field name="transientMap_" transient="true" />
   </class>
-
-  <!-- not needed
-  <class name="edm::helpers::KeyVal<edm::RefProd<std::vector<reco::Track> >,edm::RefProd<std::vector<TrackParamConstraint> > >"/>
-  -->
-
-  <class name="edm::Wrapper<edm::AssociationMap<edm::OneToOne<reco::TrackCollection,std::vector<TrackParamConstraint> > >"  persistent="false" />
 </lcgdict>