Fix OGImage icon fetch on cloudflare (#3253)

Co-authored-by: Nicolas Dorseuil <nicolas@gitbook.io>

packages/gitbook/src/routes/ogimage.tsx

@@ -9,7 +9,6 @@ import { getAssetURL } from '@/lib/assets';
 import { filterOutNullable } from '@/lib/typescript';
 import { getCacheTag } from '@gitbook/cache-tags';
 import type { GitBookSiteContext } from '@v2/lib/context';
-import { getCloudflareContext } from '@v2/lib/data/cloudflare';
 import { getResizedImageURL } from '@v2/lib/images';
 
 const googleFontsMap: { [fontName in CustomizationDefaultFont]: string } = {
@@ -322,24 +321,6 @@ function logOnCloudflareOnly(message: string) {
     }
 }
 
-/**
- * Fetch a resource from the function itself.
- * To avoid error with worker to worker requests in the same zone, we use the `WORKER_SELF_REFERENCE` binding.
- */
-async function fetchSelf(url: string) {
-    const cloudflare = getCloudflareContext();
-    if (cloudflare?.env.WORKER_SELF_REFERENCE) {
-        logOnCloudflareOnly(`Fetching self: ${url}`);
-        return await cloudflare.env.WORKER_SELF_REFERENCE.fetch(
-            // `getAssetURL` can return a relative URL, so we need to make it absolute
-            // the URL doesn't matter, as we're using the worker-self-reference binding
-            new URL(url, 'https://worker-self-reference/')
-        );
-    }
-
-    return await fetch(url);
-}
-
 /**
  * Read an image from a response as a base64 encoded string.
  */
@@ -363,6 +344,7 @@ const staticImagesCache = new Map<string, string>();
  * Read a static image and cache it in memory.
  */
 async function readStaticImage(url: string) {
+    logOnCloudflareOnly(`Reading static image: ${url}, cache size: ${staticImagesCache.size}`);
     const cached = staticImagesCache.get(url);
     if (cached) {
         return cached;
@@ -377,7 +359,7 @@ async function readStaticImage(url: string) {
  * Read an image from GitBook itself.
  */
 async function readSelfImage(url: string) {
-    const response = await fetchSelf(url);
+    const response = await fetch(url);
     const image = await readImage(response);
     return image;
 }