Drop two helpers nothing calls

src/App.css

@@ -124,7 +124,6 @@
 .warn { color: var(--atari-red); text-shadow: 0 0 8px rgba(255, 138, 122, 0.5); }
 .money { color: var(--atari-green); }
 
-.inv,
 .inv-line {
   background: var(--atari-text);
   color: var(--atari-screen-dark);

src/components/Crt.tsx

@@ -53,11 +53,6 @@ export function Line({ children, className = '' }: { children?: ReactNode; class
   return <div className={`line ${className}`}>{children ?? ' '}</div>
 }
 
-/** Atari inverse video: light background, dark characters. */
-export function Inv({ children }: { children: ReactNode }) {
-  return <span className="inv">{children}</span>
-}
-
 export function Btn({
   children,
   onClick,

src/game/rng.ts

@@ -15,7 +15,4 @@ export function makeRng(seed: number) {
 
 export type Rng = ReturnType<typeof makeRng>
 
-export const randInt = (rng: Rng, min: number, max: number) =>
-  min + Math.floor(rng() * (max - min + 1))
-
 export const chance = (rng: Rng, p: number) => rng() < p