Address code review feedback for no-modifier-argument-destructuring

Co-authored-by: NullVoxPopuli <[email protected]>

Author: Copilot

lib/rules/no-modifier-argument-destructuring.js

@@ -26,14 +26,16 @@ module.exports = {
   ERROR_MESSAGE,
 
   create(context) {
-    let modifierImportedName = undefined;
+    let modifierImportedName;
 
     return {
       ImportDeclaration(node) {
         if (node.source.value === 'ember-modifier') {
-          modifierImportedName =
-            getImportIdentifier(node, 'ember-modifier', 'modifier') ??
-            modifierImportedName;
+          modifierImportedName ??= getImportIdentifier(
+            node,
+            'ember-modifier',
+            'modifier',
+          );
         }
       },