Remove unused Bootstrap 4 classes (#1554)

app/components/arclight/online_content_filter_component.html.erb

@@ -7,7 +7,7 @@
         <%= t('arclight.views.show.online_content.title') %>
       </h2>
     </div>
-    <div class="ml-3 ms-3 ml-xl-5 ms-xl-5">
+    <div class="ms-3 ms-xl-5">
       <div><%= t('arclight.views.show.online_content.description') %></div>
       <%= link_to t('arclight.views.show.online_content.link_text'), helpers.search_action_path(f: { collection: [collection_name], access: ['online'] }) %>
     </div>

app/components/arclight/repository_breadcrumb_component.html.erb

@@ -1,5 +1,5 @@
 <li class='breadcrumb-item'>
-  <span class="ml-3 ms-3" aria-hidden="true">
+  <span class="ms-3" aria-hidden="true">
     <%= blacklight_icon(:repository, classes: 'al-repository-content-icon') %>
   </span>
   <% if repository_path %>

app/components/arclight/search_result_title_component.html.erb

@@ -3,13 +3,13 @@
     <%= helpers.link_to_document @document, counter: @counter %>
     <% @document.extent.each do |extent| %>
       <%= tag.span extent, class: 'al-document-extent badge' unless compact? %>
-    <% end %>    
-    <%= tag.span class: 'al-document-container text-muted ml-auto' do %>
+    <% end %>
+    <%= tag.span class: 'al-document-container text-muted' do %>
       <%= @document.containers.join(', ') %>
     <% end if @document.containers.present? %>
   </h3>
 
   <% actions.each do |action| %>
     <%= action %>
   <% end %>
-</header>
+</header>

app/views/shared/_main_menu_links.html.erb

@@ -1,6 +1,6 @@
 <li class="nav-item <%= repositories_active_class %>">
   <%= link_to t('arclight.routes.repositories'), arclight_engine.repositories_path, class: 'nav-link' %>
 </li>
-<li class="nav-item ml-3 ms-3 <%= collection_active_class %>">
+<li class="nav-item ms-3 <%= collection_active_class %>">
   <%= link_to t('arclight.routes.collections'), arclight_engine.collections_path, class: 'nav-link' %>
 </li>