Sweep the dead code off the court

EATEN_GRAB (write-only marker), ball.firstLand (written five places, read
nowhere), zombies' unused VOLLEY import, three scoreboard palette fields
from the pre-PNG board, the x_tin.png nothing references, and a dozen
export keywords on functions no module ever imported.

Kept on purpose: o_run3/o_run4.png — the SPR list excludes them so both
tours run on two frames (the women's set has no 3/4 twins), per the comment
at the preload list.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

config.js

@@ -362,7 +362,7 @@ export const APPLAUSE_T = 4.2;
 // and what is left is the mound · C (EATEN_SUMMARY): the summary fades in over them still feeding.
 // It is deliberately long. Oliver: "the movies surround and bite them, blood spills, and then the
 // person basically drowns in the zombies" — that cannot happen in half a second.
-export const EATEN_GRAB = 0.9, EATEN_BURST = 2.3, EATEN_SUMMARY = 3.6, EATEN_RESTART = 4.6;
+export const EATEN_BURST = 2.3, EATEN_SUMMARY = 3.6, EATEN_RESTART = 4.6;
 export const EATEN_FEED_R = 1.15; // m — how tight the feeding ring packs around the body
 
 // UI accent colours, one place so the whole HUD can be re-tuned at once. Deliberately