Code ignores shear calibration

WtG used a size and snratio dependent shear calibration. Those lines of code have been commented out for the DMstack input, both in the I/O and the likelihood calculation.

[I/O](https://github.com/deapplegate/Clusters/blob/master/pzmassfitter/astropytable_filehandler.py#L89)

[Likelihood](https://github.com/deapplegate/Clusters/blob/master/pzmassfitter/maxlike_bentstep_voigt.py#L65)