Merge pull request #3331 from projectblacklight/remove-constraints-partial

Remove the catalog/_constraints.html.erb partial

Author: jcoyne

app/views/catalog/_constraints.html.erb

@@ -13,7 +13,7 @@
 
 <% content_for(:container_header) do -%>
   <%= render 'search_results_header' %>
-  <%= render 'constraints' %>
+  <%= render (blacklight_config&.view_config(document_index_view_type)&.constraints_component || Blacklight::ConstraintsComponent).new(search_state: search_state) %>
 <% end %>
 
 <%= render 'search_header' %>