Three independent changes, none of which alter runtime behaviour.
1. Remove ScrollHelper._get_visible_portion_subpixel and
_interpolate_subpixel (162 lines). get_visible_portion dispatches only to
_blend_visible_portion, so _get_visible_portion_subpixel had no caller, and
_interpolate_subpixel was reachable only from inside it -- a closed island.
_blend_visible_portion's own docstring already records that the scipy path
it replaced was dead; the replacement landed but the corpse stayed.
2. scripts/check_plugin.py: also search ../ledmatrix-plugins/plugins. The
scoreboards live in the sibling checkout, so --all silently skipped every
one of them and only --plugin-dir reached them.
3. .gitignore: ignore config/.config_secrets.json.tmp.*, which the suite
leaves behind several of per run.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
