senat campaign: Fix gallery multiline

senat_campaign/templates/senat_campaign/senat_campaign_home_page.html

@@ -121,7 +121,7 @@
         {% for block in page.about_gallery %}
           {% image block.value width-2000 as img %}
           {% image block.value fill-300x200 as thumb %}
-          <div class="col-6 col-md-3 mb-4 mb-md-0">
+          <div class="col-6 col-md-3 mb-4">
             <a data-fancybox="gallery" href="{{ img.url }}"><img data-src="{{ thumb.url }}" class="lazyload img-fluid" alt="{{ thumb.alt }}"></a>
           </div><!-- /column -->
         {% endfor %}