Hide Admin Set Viewers and Managers in UI

These features are not yet implemented and are not in scope for Sufia 7.3.0 now that we are in release candidate mode.

Will be implemented in Hyrax post-1.0.0 and may be backported to Sufia.

Fixes #3149

app/views/sufia/admin/admin_sets/_form_participants.html.erb

@@ -2,7 +2,7 @@
             <div class="panel panel-default labels">
               <div class="panel-body">
                 <h2><%= t('.add_participants') %></h2>
-                <% access_options = options_for_select([['Manager', 'manage'], ['Depositor', 'deposit'], ['Viewer', 'view']]) %>
+                <% access_options = options_for_select([['Depositor', 'deposit']]) %>
                 <%= simple_form_for @form.permission_template,
                                     url: [sufia, :admin, @form, :permission_template],
                                     html: { id: 'group-participants-form' } do |f| %>
@@ -59,9 +59,9 @@
 
                 <fieldset>
                   <legend><%= t(".current_participants") %></legend>
-                  <%= render 'form_participant_table', access: 'managers', filter: :manage? %>
+                  <%# render 'form_participant_table', access: 'managers', filter: :manage? %>
                   <%= render 'form_participant_table', access: 'depositors', filter: :deposit? %>
-                  <%= render 'form_participant_table', access: 'viewers', filter: :view? %>
+                  <%# render 'form_participant_table', access: 'viewers', filter: :view? %>
                 </fieldset>
               </div>
             </div>