OEL-1374: Remove template.

templates/overrides/search/views-view-unformatted.html.twig

-{#
-/**
- * @file
- * Theme implementation to display showcase_search unformatted rows.
- *
- * @see ./core/modules/views/templates/views-view-unformatted.html.
- */
-#}
-{% if view.current_display == 'showcase_search_page' %}
-  {% if title %}
-    <h3>{{ title }}</h3>
-  {% endif %}
-  {% for row in rows %}
-    {% set row_classes = [
-      default_row_class ? 'views-row',
-    ] %}
-    <div{{ row.attributes.addClass(row_classes) }}>
-      {{- row.content -}}
-    </div>
-  {% endfor %}
-{% endif %}
-<hr class="d-none d-md-block mt-4-5">