[ATR-20420] Update MTCalibPebConfig.py to remove explicit menu file input
Update MTCalibPebConfig.py to remove explicit menu file input. Now reads this object from the DetStore.
Follows on from !26071 (merged) where this property was deleted.
Update MTCalibPebConfig.py to remove explicit menu file input. Now reads this object from the DetStore.
Follows on from !26071 (merged) where this property was deleted.