Revert "Set user agent in cached-fetch request."

This reverts commit 891610ea7f.

src/utils/proxy/cached-fetch.js

@@ -12,11 +12,7 @@ export default async function cachedFetch(url, duration) {
     return cached;
   }
 
-  const data = await fetch(url, {
-    headers: {
-      "User-Agent": "Mozilla/5.0",
-    },
-  }).then((res) => res.json());
+  const data = await fetch(url).then((res) => res.json());
   cache.put(url, data, duration * 1000 * 60);
   return data;
 }