Remove obsolete DOMContentLoadedEventListener

app/assets/javascripts/pages/projects/jobs/index/index.js

 import Vue from 'vue';
 import GlCountdown from '~/vue_shared/components/gl_countdown.vue';
 
-document.addEventListener('DOMContentLoaded', () => {
-  const remainingTimeElements = document.querySelectorAll('.js-remaining-time');
-  remainingTimeElements.forEach(
-    (el) =>
-      new Vue({
-        el,
-        render(h) {
-          return h(GlCountdown, {
-            props: {
-              endDateString: el.dateTime,
-            },
-          });
-        },
-      }),
-  );
-});
+const remainingTimeElements = document.querySelectorAll('.js-remaining-time');
+remainingTimeElements.forEach(
+  (el) =>
+    new Vue({
+      el,
+      render(h) {
+        return h(GlCountdown, {
+          props: {
+            endDateString: el.dateTime,
+          },
+        });
+      },
+    }),
+);