clear_chip_config should not remove DiffVff for ITkPix v1.1
To untune the chip we currently have the clear_chip_config.py
which also removes DiffVff
which is not needed for v1.1 as there is no threshold tuning.
In module QC the DiffVff
depends on the layer of the module, which is 150 for the inner system and 60 for the outer system. The default in YARR is currently set to 160.
Still have to think about how to deal with it in v2.