diff --git a/core/themes/claro/claro.theme b/core/themes/claro/claro.theme
index 859ff0c042..b8e7fb32c7 100644
--- a/core/themes/claro/claro.theme
+++ b/core/themes/claro/claro.theme
@@ -826,13 +826,8 @@ function claro_preprocess_field_multiple_value_form(&$variables) {
   $variables['disabled'] = !empty($variables['element']['#disabled']);
 
   if ($variables['multiple']) {
-    // Add an additional CSS class for the field label table cell.
-    //
-    // If the field is multiple, we don't have to check the existence of the
-    // table header cell.
-    // Using array_key_first() for addressing the first header cell would be
-    // more elegant here, but we can rely on the related theme.inc preprocess.
-    //
+    // Add an additional CSS class to the field label table cell. The table
+    // header cell exists always in a multiple value field.
     // @see template_preprocess_field_multiple_value_form().
     $variables['table']['#header'][0]['data']['#attributes']['class'][] = 'form-item__label';
     $variables['table']['#header'][0]['data']['#attributes']['class'][] = 'form-item__label--multiple-value-form';