Exclude category_code attribute from list

Author: thomas-kl1

Model/Config/Source/Category/VisibleAttributes.php

@@ -65,6 +65,7 @@ private function createVisibleAttributeCollection(): Collection
             ['']
         );
         $collection->addFieldToFilter('cea.is_visible', 1);
+        $collection->addFieldToFilter('attribute_code', 'category_code');
         $collection->setOrder('frontend_label', 'ASC');
         $collection->setOrder('attribute_code', 'ASC');