OEL-1919: Target facet classes for oel styling.

resources/sass/components/_facets.scss

-.oel-facets-checkbox-list {
+.facets-widget-checkbox .item-list__checkbox {
   padding-left: 0;
   list-style-type: none;
 }

templates/facets/facets-item-list.html.twig

@@ -11,9 +11,6 @@
   {% if facet.widget.type == 'dropdown' -%}
     {%- set attributes = attributes.addClass('form-select') %}
   {%- endif %}
-  {% if facet.widget.type == 'checkbox' -%}
-    {%- set attributes = attributes.addClass('oel-facets-checkbox-list') %}
-  {%- endif %}
   {% if items or empty %}
     {%- if title is not empty -%}
       <legend class="col-form-label"><span class="fieldset-legend">{{ title }}</span></legend>