Remove mention of shutdown from export page

app/views/settings/_export.haml

@@ -2,10 +2,7 @@
   .card-body
     %h2 Export your data
     %p
-      With the announcement of
-      = succeed ',' do
-        %a{href: 'http://blog.retrospring.net/saying-goodbye/'} shutting down Retrospring on June 8 2016
-      we promised you one last feature: exporting all your data.  The data is inside a
+      The data is inside a
       %code= ".tar.gz"
       archive and available in three formats: YAML, JSON, and XML.  The archive also contains a copy of your
       profile picture and header picture in all sizes.