some changes

hyrax/app/controllers/catalog_controller.rb

@@ -7,6 +7,7 @@ class CatalogController < ApplicationController
 
   # This filter applies the hydra access controls
   before_action :enforce_show_permissions, only: :show
+  before_action :restrict_public_user_to_view_depositor
   # Allow all search options when in read-only mode
   skip_before_action :check_read_only
 
@@ -329,4 +330,12 @@ class CatalogController < ApplicationController
   def render_bookmarks_control?
     false
   end
+
+  private
+
+  def restrict_public_user_to_view_depositor
+    if current_user.nil?
+      blacklight_config.index_fields = blacklight_config.index_fields.except('proxy_depositor_ssim', 'depositor_tesim')
+    end
+  end
 end

hyrax/app/views/catalog/_index_list_default.html.erb

-<div class="col-md-6">
-  <div class="metadata">
-    <dl class="dl-horizontal">
-    <% doc_presenter = index_presenter(document) %>
-    <% index_fields = current_user ? index_fields(document) : index_fields(document).except('depositor_tesim', 'proxy_depositor_ssim') %>
-
-    <% index_fields.each do |field_name, field| -%>
-      <% if should_render_index_field? document, field %>
-          <dt data-solr-field-name="<%= field_name %>"><%= render_index_field_label document, field: field_name %></dt>
-          <dd><%= doc_presenter.field_value field %></dd>
-      <% end %>
-    <% end %>
-    </dl>
-  </div>
-</div>
-<% if document.collection? %>
-<% collection_presenter = Hyrax::CollectionPresenter.new(document, current_ability) %>
-<div class="col-md-4">
-  <div class="collection-counts-wrapper">
-    <div class="collection-counts-item">
-      <span><%= collection_presenter.total_viewable_collections %></span>Collections
-    </div>
-    <div class="collection-counts-item">
-      <span><%= collection_presenter.total_viewable_works %></span>Works
-    </div>
-  </div>
-</div>
-<% end %>
\ No newline at end of file