Remove unnecessary include or forward declaration of IRegSelSvc

• Remove unnecessary include or forward declaration of IRegSelSvc
• Trigger/TrigAlgorithms/TrigT2CaloCommon/TrigT2CaloCommon/ITrigDataAccess.h needs the following includes. Those were included through #include "IRegionSelector/IRegSelSvc.h"
  • #include "IRegionSelector/IRoiDescriptor.h"
  • #include "IRegionSelector/RegSelEnums.h"`
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tag @sutt