form_validate_number is still refered too

While creating a new entity with a number field /admin/structure/types/manage/task/fields/node.task.field_points
saving the field gives

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'form_validate_number' not found or invalid function name in Drupal\Core\Form\FormValidator->doValidateForm() (line 266 of core/lib/Drupal/Core/Form/FormValidator.php).

This seemed to be missed through #2326891: Convert system_element_info() to Element classes

This needs something like

+      '#element_validate' => array(
+        array($class, 'validateColor'),
+      ),

git diff 9c537ec4b20c4416c9b0265c1eeeb1d90ca0952a..9db4af56dae753528a2ffb721fed9d51e11f05b2