Drop outdated code

source/npmhub.js

@@ -22,24 +22,15 @@ function getPackageURL() {
  // Example URLs:
  // https://github.com/npmhub/npmhub
  // https://github.com/eslint/eslint/tree/main/packages/eslint-config-eslint
- return document.querySelector([
- '.react-directory-filename-column :is(a[title="package.json"], [title="package.json"] a)',
- '#files ~ div [title="package.json"]', // GitHub pre-2022 refresh
- ])?.href;
+ return document.querySelector(`
+ .react-directory-filename-column :is(
+ a[title="package.json"],
+ [title="package.json"] a
+ )
+ `)?.href;
 }
 
 async function init() {
- // If this fragment exists, then the list is deferred.
- // Adapted from https://github.com/sindresorhus/refined-github/blob/b141596/source/github-events/on-file-list-update.ts
- const ajaxFiles = await elementReady('#files ~ include-fragment[src*="/file-list/"]');
- if (ajaxFiles) {
- await new Promise(resolve => {
- new MutationObserver(resolve).observe(ajaxFiles.parentNode, {
- childList: true,
- });
- });
- }
-
  if (
  document.querySelector('.npmhub-header')
  || !hasPackageJson()