views: remove IP addresses from most pages.

Removed IP addresses from comments and from most other listing pages.
IPs take up a lot of space in many places (especially IPv6 addresses),
and in most of these pages they're rarely useful for catching
sockpuppets.

app/views/comments/partials/show/_comment.html.erb

@@ -53,13 +53,6 @@
           <li class="comment-unvote-link">
             <%= link_to "Unvote", comment_comment_votes_path(comment_id: comment.id), method: :delete, remote: true %>
           </li>
-          <% if CurrentUser.is_moderator? %>
-            <li>|</li>
-            <li>
-              <strong>IP</strong>
-              <span><%= link_to_ip comment.creator_ip_addr %></span>
-            </li>
-          <% end %>
         </menu>
         <% if comment.editable_by?(CurrentUser.user) %>
           <%= render "comments/form", comment: comment, hidden: true %>