Revert "Removing obsolete calibration files."

This reverts commit a5dc292e518c9d2bc579e424b006c1b95afcedfd.
Revert "Revert "Removing obsolete calibration files.""

This reverts commit c8552c67c6f0b7409fcfdcf82cf933e3fc33bb85.
Revert "Revert "Revert "Removing obsolete calibration files."""

This reverts commit bf72c6c4e43b3d4b20450362180f8420efee0f17.