tidy up sciname display on crops#show

app/views/crops/show.html.haml

@@ -81,7 +81,7 @@
             = @crop.name
             is a variety of
             = link_to @crop.parent, @crop.parent
-      .list-group
+      .list-group.list-group-flush
         .list-group-item.list-group-flush.d-flex.justify-content-between.align-items-center
           = link_to crop_plantings_path(@crop), class: 'card-link' do
             = planting_icon