Remove IDecayFinder from DecayTreeTupleBase dict as already included in DaVinciInterfaces dict

Christopher Rob Jonesrequested to merge
do-not-add-IDecayFinder-dict into master

Fixes build warning

Warning in <TInterpreter::ReadRootmapFile>: class  IDecayFinder found in libDaVinciInterfacesDict.so  is already in libDecayTreeTupleBaseDict.so
Edited by Christopher Rob Jones

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