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>

audio.js

@@ -138,7 +138,7 @@ export const zombieDuck = out => fadeBed('zombie-mode.m4a', out); // key must ma
 export const menuDuck = out => fadeBed('background-music.m4a', out);
 
 let sysVoice = null;
-export function say(text, delay = 0) { // fallback when a recorded umpire line is missing
+function say(text, delay = 0) { // fallback when a recorded umpire line is missing
   try {
     if (!sysVoice) sysVoice = speechSynthesis.getVoices().find(v => v.lang.startsWith('en-GB')) || null;
     const u = new SpeechSynthesisUtterance(text);