Issue #3445704: Cannot unset offset 'parent' on array{id: mixed, data-tt-id:...

Issue #3445704: Cannot unset offset 'parent' on array{id: mixed, data-tt-id: mixed, class: array{}, data: array, data-tt-parent-id: mixed}

Closes #3445704

src/Element/TokenTreeTable.php

@@ -143,7 +143,6 @@ class TokenTreeTable extends Table {
     }
     elseif (!empty($token_info['parent'])) {
       $row['data-tt-parent-id'] = static::cleanCssIdentifier($token_info['parent']);
-      unset($row['parent']);
     }
 
     return $row;