chore: retira Carrusel, sin consumidores desde que el recorrido se apila

PuntosInflexion era el único que lo montaba. Se va también la referencia
que le quedaba colgando en el comentario de useAutoStep.

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

lib/motion.ts

@@ -66,8 +66,7 @@ export const motionProps = (reduced: boolean) =>
 
 // Cycles through `count` steps on its own (Mecanismo, ComoEmpezar): each
 // manual change restarts the dwell timer, hovering pauses it, and it never
-// advances at all for reduced-motion users — same shape as the Carrusel
-// autoplay, for step indicators that aren't a carousel.
+// advances at all for reduced-motion users.
 export function useAutoStep(count: number, intervalMs = 3500) {
   const reduced = usePrefersReducedMotion();
   const [active, setActive] = useState(0);