do not render errors for checkboxes twice

Author: xabbuh

Resources/views/Form/bootstrap_4_horizontal_layout.html.twig

@@ -71,7 +71,6 @@ col-sm-10
         <div class="{{ block('form_label_class') }}"></div>{#--#}
         <div class="{{ block('form_group_class') }}">
             {{- form_widget(form) -}}
-            {{- form_errors(form) -}}
         </div>{#--#}
     </div>
 {%- endblock checkbox_row %}