Remove seemingly unused ThinTrackParticlesTool ThinTrackParticlesAlg
requested to merge ATLAS-EGamma/athena:archive_seemingly_unused_ThinTrackParticlesTool_ThinTrackParticlesAlg into master
Remove seemingly unused ThinTrackParticlesTool ThinTrackParticlesAlg
Actually we should have more "modern" solution under Derivation framework for quite some time .