chore: don't globalise fetch

Author: vixalien

src/muse.ts

@@ -6,7 +6,6 @@ import { Headers } from "headers-polyfill";
 globalThis.Headers = Headers;
 
 // Headers
-import "./polyfills/fetch.js";
 
 // base64
 import "./polyfills/base64.js";
@@ -20,7 +19,9 @@ import "./polyfills/abortcontroller.js";
 
 import { setup } from "libmuse";
 import { MuzikaSecretStore } from "./util/secret-store.js";
+import { fetch } from "./polyfills/fetch.js";
 
 setup({
   store: new MuzikaSecretStore(),
+  fetch: fetch as unknown as typeof globalThis.fetch,
 });

src/polyfills/fetch.ts

@@ -303,6 +303,3 @@ export async function fetch(url: string | URL, options: FetchOptions = {}) {
 
   return response;
 }
-
-// @ts-expect-error setting a global
-window.fetch = fetch;