fix: remove unused currentMeme variable to resolve TS6133 build error

Author: agent

src/pages/play/MemeGenerator.tsx

@@ -22,7 +22,7 @@ const memeTemplates = [
 ];
 
 export default function MemeGenerator() {
-  const [currentMeme, setCurrentMeme] = useState(memeTemplates[0]);
+  const [, setCurrentMeme] = useState(memeTemplates[0]);
   const [topText, setTopText] = useState(memeTemplates[0].top);
   const [bottomText, setBottomText] = useState(memeTemplates[0].bottom);
   const canvasRef = useRef<HTMLCanvasElement>(null);