delete "calotoweroptmaker"

This PR deletes *calotoweroptmaker*, which was an alternative to *towerMaker* and used as the inputs to a set of optimized caloMETs.

The names of the optimized caloMETs started with "metOpt". These were event contents of RECO and were discontinued at CMSSW_6_1_X:
https://hypernews.cern.ch/HyperNews/CMS/get/physics-validation/1913.html