Remove DOMContentLoaded Eventlisteners

Removing DOMContentLoaded Eventlisteners from
index files since the scripts
are embedded using the defer tag.

ee/app/assets/javascripts/pages/projects/insights/index.js

 import initInsights from 'ee/insights';
 
-document.addEventListener('DOMContentLoaded', () => {
-  initInsights();
-});
+initInsights();

ee/app/assets/javascripts/pages/projects/quality/test_cases/index.js

 import initTestCaseList from 'ee/test_case_list/test_case_list_bundle';
 
-document.addEventListener('DOMContentLoaded', () => {
-  initTestCaseList({
-    mountPointSelector: '#js-test-cases-list',
-  });
+initTestCaseList({
+  mountPointSelector: '#js-test-cases-list',
 });

ee/app/assets/javascripts/pages/projects/quality/test_cases/new/index.js

 import { initTestCaseCreate } from 'ee/test_case_create/test_case_create_bundle';
 
-document.addEventListener('DOMContentLoaded', () => {
-  initTestCaseCreate({
-    mountPointSelector: '#js-create-test-case',
-  });
+initTestCaseCreate({
+  mountPointSelector: '#js-create-test-case',
 });

ee/app/assets/javascripts/pages/projects/settings/ci_cd/show/index.js

@@ -6,33 +6,31 @@ import ProtectedEnvironmentEditList from 'ee/protected_environments/protected_en
 import showToast from '~/vue_shared/plugins/global_toast';
 import '~/pages/projects/settings/ci_cd/show/index';
 
-document.addEventListener('DOMContentLoaded', () => {
-  const el = document.getElementById('js-managed-licenses');
-  const toasts = document.querySelectorAll('.js-toast-message');
+const el = document.getElementById('js-managed-licenses');
+const toasts = document.querySelectorAll('.js-toast-message');
 
-  if (el && el.dataset && el.dataset.apiUrl) {
-    const store = createStore();
-    store.dispatch('licenseManagement/setIsAdmin', Boolean(el.dataset.apiUrl));
-    store.dispatch('licenseManagement/setAPISettings', { apiUrlManageLicenses: el.dataset.apiUrl });
-    // eslint-disable-next-line no-new
-    new Vue({
-      el,
-      store,
-      render(createElement) {
-        return createElement(LicenseManagement, {
-          props: {
-            ...el.dataset,
-          },
-        });
-      },
-    });
-  }
+if (el?.dataset?.apiUrl) {
+  const store = createStore();
+  store.dispatch('licenseManagement/setIsAdmin', Boolean(el.dataset.apiUrl));
+  store.dispatch('licenseManagement/setAPISettings', { apiUrlManageLicenses: el.dataset.apiUrl });
+  // eslint-disable-next-line no-new
+  new Vue({
+    el,
+    store,
+    render(createElement) {
+      return createElement(LicenseManagement, {
+        props: {
+          ...el.dataset,
+        },
+      });
+    },
+  });
+}
 
-  toasts.forEach(toast => showToast(toast.dataset.message));
+toasts.forEach(toast => showToast(toast.dataset.message));
 
-  // eslint-disable-next-line no-new
-  new ProtectedEnvironmentCreate();
+// eslint-disable-next-line no-new
+new ProtectedEnvironmentCreate();
 
-  // eslint-disable-next-line no-new
-  new ProtectedEnvironmentEditList();
-});
+// eslint-disable-next-line no-new
+new ProtectedEnvironmentEditList();

ee/app/assets/javascripts/pages/trials/country_select.js

@@ -3,24 +3,22 @@ import axios from '~/lib/utils/axios_utils';
 import { __ } from '~/locale';
 import { deprecatedCreateFlash as Flash } from '~/flash';
 
-document.addEventListener('DOMContentLoaded', () => {
-  const selectElement = document.getElementById('country_select');
-  const { countriesEndPoint, selectedOption } = selectElement.dataset;
+const selectElement = document.getElementById('country_select');
+const { countriesEndPoint, selectedOption } = selectElement.dataset;
 
-  axios
-    .get(countriesEndPoint)
-    .then(({ data }) => {
-      // fill #country_select element with array of <option>s
-      data.forEach(([name, code]) => {
-        const option = document.createElement('option');
-        option.value = code;
-        option.text = name;
+axios
+  .get(countriesEndPoint)
+  .then(({ data }) => {
+    // fill #country_select element with array of <option>s
+    data.forEach(([name, code]) => {
+      const option = document.createElement('option');
+      option.value = code;
+      option.text = name;
 
-        selectElement.appendChild(option);
-      });
-      $(selectElement)
-        .val(selectedOption)
-        .trigger('change.select2');
-    })
-    .catch(() => new Flash(__('Error loading countries data.')));
-});
+      selectElement.appendChild(option);
+    });
+    $(selectElement)
+      .val(selectedOption)
+      .trigger('change.select2');
+  })
+  .catch(() => new Flash(__('Error loading countries data.')));