Fix #4924: Moderator dashboard shouldn't show a "Promote" link that's unusable by non-moderators

Remove these links entirely.

app/views/moderator/dashboards/_activity_note.html.erb

@@ -9,7 +9,7 @@
   <tbody>
     <% @dashboard.notes.each do |activity| %>
       <tr>
-        <td><%= mod_link_to_user(activity.user, :positive) %></td>
+        <td><%= link_to_user(activity.user) %></td>
         <td><%= link_to activity.count, note_versions_path(:search => {:updater_id => activity.user.id}) %></td>
       </tr>
     <% end %>