close #2799 Fixed: Company delete can not delete sub categories

app/Listeners/Setting/DeleteCategoryDeletedSubCategories.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Listeners\Setting;
+
+use App\Events\Setting\CategoryDeleted as Event;
+use App\Jobs\Setting\DeleteCategory;
+use App\Traits\Jobs;
+
+class DeleteCategoryDeletedSubCategories
+{
+    use Jobs;
+
+    /**
+     * Handle the event.
+     *
+     * @param  $event
+     * @return void
+     */
+    public function handle(Event $event)
+    {
+        $category = $event->category;
+
+        if (empty($category->sub_categories)) {
+            return;
+        }
+
+        foreach ($category->sub_categories as $sub_category) {
+            $this->dispatch(new DeleteCategory($sub_category));
+        }
+    }
+}