chore: remove unused fetch-and-cache.js (#42358)

client/src/templates/Challenges/utils/fetch-and-cache.js

@@ -1,74 +0,0 @@
-import { throwError } from 'rxjs';
-import axios from 'axios';
-
-// value used to break browser ajax caching
-const cacheBreakerValue = Math.random();
-
-export function createFetchScript() {
-  const cache = new Map();
-  return async function fetchScript({
-    src,
-    cacheBreaker = false,
-    crossDomain = true
-  } = {}) {
-    if (!src) {
-      throw new Error('No source provided for script');
-    }
-    if (cache.has(src)) {
-      return cache.get(src);
-    }
-    const url = cacheBreaker ? `${src}?cacheBreaker=${cacheBreakerValue}` : src;
-    const script = await axios
-      .get({ url, crossDomain })
-      .then(res => {
-        if (res.status !== 200) {
-          throw new Error('Request error: ' + res.status);
-        }
-      })
-      .then(({ data }) => data)
-      .then(script => `<script>${script}</script>`)
-      .catch(() => '');
-
-    cache.set(src, script);
-    return script;
-  };
-}
-
-export const fetchScript = createFetchScript();
-
-export function createFetchLink() {
-  const cache = new Map();
-  return async function fetchLink({
-    link: href,
-    raw = false,
-    crossDomain = true
-  } = {}) {
-    if (!href) {
-      return throwError(new Error('No source provided for link'));
-    }
-    if (cache.has(href)) {
-      return cache.get(href);
-    }
-    // css files with `url(...` may not work in style tags
-    // so we put them in raw links
-    if (raw) {
-      const link = `<link href=${href} rel='stylesheet' />`;
-      cache.set(href, link);
-      return link;
-    }
-    const link = await axios
-      .get({ url: href, crossDomain })
-      .then(res => {
-        if (res.status !== 200) {
-          throw new Error('Request error: ' + res.status);
-        }
-      })
-      .then(({ data }) => data)
-      .then(styles => `<style>${styles}</style>`)
-      .catch(() => '');
-    cache.set(href, link);
-    return link;
-  };
-}
-
-export const fetchLink = createFetchLink();