🐛 Remove appDir false workaround

- Not needed since vercel/next.js#49274 was merged

Author: n1ckoates

next.config.js

@@ -6,7 +6,4 @@ module.exports = withContentlayer({
 	images: {
 		deviceSizes: [320, 448, 640, 768, 896],
 	},
-	experimental: {
-		appDir: false,
-	},
 });