Remove obsolete DOMContentLoadedEventListener

app/assets/javascripts/pages/projects/merge_requests/creations/index.js

 import initMergeRequest from '~/pages/projects/merge_requests/init_merge_request';
 
-document.addEventListener('DOMContentLoaded', initMergeRequest);
+initMergeRequest();

app/assets/javascripts/pages/projects/merge_requests/creations/new/index.js

@@ -2,16 +2,14 @@ import MergeRequest from '~/merge_request';
 import initPipelines from '~/commit/pipelines/pipelines_bundle';
 import initCompare from './compare';
 
-document.addEventListener('DOMContentLoaded', () => {
-  const mrNewCompareNode = document.querySelector('.js-merge-request-new-compare');
-  if (mrNewCompareNode) {
-    initCompare(mrNewCompareNode);
-  } else {
-    const mrNewSubmitNode = document.querySelector('.js-merge-request-new-submit');
-    // eslint-disable-next-line no-new
-    new MergeRequest({
-      action: mrNewSubmitNode.dataset.mrSubmitAction,
-    });
-    initPipelines();
-  }
-});
+const mrNewCompareNode = document.querySelector('.js-merge-request-new-compare');
+if (mrNewCompareNode) {
+  initCompare(mrNewCompareNode);
+} else {
+  const mrNewSubmitNode = document.querySelector('.js-merge-request-new-submit');
+  // eslint-disable-next-line no-new
+  new MergeRequest({
+    action: mrNewSubmitNode.dataset.mrSubmitAction,
+  });
+  initPipelines();
+}