do not advertise gravatar in profile if disabled

app/views/profiles/show.html.haml

@@ -68,10 +68,12 @@
             %p.light
               - if @user.avatar?
                 You can change your avatar here
+                - if Gitlab.config.gravatar.enabled
                   %br
                   or remove the current avatar to revert to #{link_to "gravatar.com", "http://gravatar.com"}
               - else
                 You can upload an avatar here
+                - if Gitlab.config.gravatar.enabled
                   %br
                   or change it at #{link_to "gravatar.com", "http://gravatar.com"}
             %hr