Cleanup TrigT1NSWSimTools
Sweeps https://gitlab.cern.ch/atlas/athenaprivate1/merge_requests/16714 to master: fix naming issues, remove unused includes and data members, switch to ATH_MSG for logging, etc.
Sweeps https://gitlab.cern.ch/atlas/athenaprivate1/merge_requests/16714 to master: fix naming issues, remove unused includes and data members, switch to ATH_MSG for logging, etc.