Remove CaloFutureClusterMCTruth.cpp

We currently have two very similar algorithms for Cluster mc matching:

• CaloFutureClusterMCTruth: not used anywhere in Moore (Moore tests run fine without it)
• CaloClusterMCTruth: used so far in all the mc checks in https://gitlab.cern.ch/lhcb/Moore/-/blob/master/Hlt/RecoConf/python/RecoConf/calorimeter_mc_checking.py

Main issue reported by @jmarchan : results change a bit if using one or the other, so we need to understand which one is the correct one and remove the other to avoid future confusions.