DenseEnvironmentsAmbiguityProcessorTool, rm extrapolator. Was retrieved but never used
requested to merge ATLAS-EGamma/athena:DenseEnvironmentsAmbiguityProcessorTool_rm_uneeded into master
DenseEnvironmentsAmbiguityProcessorTool, rm extrapolator. Was retrieved but never used
ping @emoyse as should solve in a better way issues he observed in !47792 (merged)