Chore: Remove Rails UJS (#4276)

Because:
* Rails Ujs has been depreciated in favor of Hotwire.

app/components/notification_component.html.erb

@@ -1,4 +1,4 @@
-<%= link_to notification_path(@notification), method: :patch, class: 'no-underline px-4 py-4', data: { test_id: "notification-#{@notification.id}" } do %>
+<%= link_to notification_path(@notification), class: 'no-underline px-4 py-4', data: { turbo_method: :patch, test_id: "notification-#{@notification.id}" } do %>
   <li class="bg-white dark:bg-gray-800 dark:shadow-none dark:ring-1 dark:ring-white/10 dark:ring-inset shadow overflow-hidden p-4 sm:rounded-md">
     <div class="flex">
       <div class="mr-4 flex-shrink-0">

app/javascript/application.js

@@ -14,13 +14,10 @@
 // const images = require.context('../images', true)
 // const imagePath = (name) => images(name, true)
 
-import Rails from '@rails/ujs';
 import 'core-js/stable';
 import 'regenerator-runtime/runtime';
 import 'hint.css/hint.min.css';
 import '@fortawesome/fontawesome-free/css/all.css';
 import 'controllers';
 import '@hotwired/turbo-rails';
 import './src/custom_turbo_stream_actions';
-
-Rails.start();

package.json

@@ -20,7 +20,6 @@
     "@hotwired/stimulus-webpack-helpers": "^1.0.1",
     "@hotwired/turbo-rails": "^7.3.0",
     "@rails/request.js": "^0.0.9",
-    "@rails/ujs": "^7.0.8",
     "@sentry/browser": "^7.66.0",
     "@stimulus/polyfills": "^2.0.0",
     "@tailwindcss/forms": "^0.5.7",