Removed outdated information about calibration metrics from 2 locations

[caroharris-maker]

Fixes b/515780570

[google-cla]

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[pavoljuhas]

LGTM. Please ping me when the CLA is in place so we can merge this.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.60%. Comparing base (3db82dd) to head (2bbb0f2).
⚠️ Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8125      +/-   ##
==========================================
- Coverage   99.60%   99.60%   -0.01%     
==========================================
  Files        1118     1118              
  Lines      100957   100957              
==========================================
- Hits       100557   100556       -1     
- Misses        400      401       +1     

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