chore(schema): drop unused exported constants

themes, allowedSizes, and allowedFps had no importers; the theme list already lives in the request schema.

renderer/src/schemas/wheel-request.js

@@ -1,8 +1,5 @@
 import {z} from 'zod';
 
-export const themes = ['classic', 'festival', 'mono'];
-export const allowedSizes = [384, 480, 512];
-export const allowedFps = [12, 15, 20];
 const themeSchema = z.union([z.literal('classic'), z.literal('festival'), z.literal('mono')]);
 
 /**