discardBaseline

Drops the recorded baselines for a language.

Must be called whenever <language>.csv is replaced from outside the plugin - a download from magmaguy.com/api/elitemobs_translations, or a regenerated custom.csv. The sidecar describes the file it was derived from; against a different file every row whose English happens to differ looks hand-edited, and reconciliation would then correctly but uselessly refuse to touch any of them. Deleting it puts the language back into the adoption path, which records the new file as the reference point without rewriting anything.