remove unnecessary DOM Content Loaded Event Listener

app/assets/javascripts/behaviors/index.js

@@ -25,19 +25,17 @@ initPageShortcuts();
 initCollapseSidebarOnWindowResize();
 initSelect2Dropdowns();
 
-document.addEventListener('DOMContentLoaded', () => {
-  window.requestIdleCallback(
-    () => {
-      // Check if we have to Load GFM Input
-      const $gfmInputs = $('.js-gfm-input:not(.js-gfm-input-initialized)');
-      if ($gfmInputs.length) {
-        import(/* webpackChunkName: 'initGFMInput' */ './markdown/gfm_auto_complete')
-          .then(({ default: initGFMInput }) => {
-            initGFMInput($gfmInputs);
-          })
-          .catch(() => {});
-      }
-    },
-    { timeout: 500 },
-  );
-});
+window.requestIdleCallback(
+  () => {
+    // Check if we have to Load GFM Input
+    const $gfmInputs = $('.js-gfm-input:not(.js-gfm-input-initialized)');
+    if ($gfmInputs.length) {
+      import(/* webpackChunkName: 'initGFMInput' */ './markdown/gfm_auto_complete')
+        .then(({ default: initGFMInput }) => {
+          initGFMInput($gfmInputs);
+        })
+        .catch(() => {});
+    }
+  },
+  { timeout: 500 },
+);