Function drop_superseded 

pub(crate) fn drop_superseded(
    rows: &mut Vec<(usize, i64, u64)>,
    identity: &[bool],
) -> usize

Removes identity-calibration rows whose sample is also kept under a real calibration.

Arguments

• rows - Sorted, deduplicated rows of one window; changed in place.
• identity - For each metadata group, whether it has no real calibration.

Returns

The number of rows removed.