renaming decimation and fraction in ID + cleanupoverlap unreachable code

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (bdc0bf6) 79.21% compared to head (d2987a1) 79.97%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #115 +/- ## ========================================== + Coverage 79.21% 79.97% +0.75% ========================================== Files 15 15 Lines 2536 2512 -24 ========================================== Hits 2009 2009 + Misses 527 503 -24 ```

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[AldoGl]

Thanks @diegodoimo, a much needed change