Remove cut on untuned threshold mean

Cuts are applied on untuned threshold mean requiring a mean > 1700e :

https://gitlab.cern.ch/atlas-itk/pixel/module/module-qc-analysis-tools/-/blob/main/src/module_qc_analysis_tools/data/analysis_cuts.json?ref_type=heads#L126

Starting from post-parylene characterization we expect these cuts to systematically fail since the module would have been tuned during initial characterization already.

The proposal (already applied in the reporting according to @mmarjano) is to drop the cut on untuned threshold mean.

An alternative would be to apply it only for initial characterization but mqat does not support this yet.

I'm not sure if removing the cut from the file pointed above would be enough (?).

Tagging @hpang with who we noticed the issue.