Revert "fix: clone cached responses"

This reverts commit f517004.

src/lib/cache.ts

@@ -25,8 +25,7 @@ export async function withCache(
 			return new Response(null, { status: 304 });
 		}
 		console.log("cache hit");
-		// Clone cached response so we can modify its headers
-		return response.clone();
+		return response;
 	}
 
 	response = await responseFactory();