fix: remove number fetcher

src/core/blitzkrieg/numberFetcher.ts

@@ -1,6 +0,0 @@
-import { Fetcher } from 'swr';
-
-export const numberFetcher: Fetcher<number, string> = (url) =>
-  fetch(url)
-    .then((res) => res.text())
-    .then(parseInt);