Remove a missed file and update the doc file
As part of my checks, after removing the IRegSelSvc.h interface, I put it back to get the code working and then forgot to remove it again. This should be the last part of the jigsaw.
As part of my checks, after removing the IRegSelSvc.h interface, I put it back to get the code working and then forgot to remove it again. This should be the last part of the jigsaw.