Merge pull request #875 from YaleSTC/853_migrations

Resolves #853 by tweaking migration

Author: orenyk

db/migrate/20140611142209_move_admin_notes_to_comments.rb

@@ -7,11 +7,6 @@ def self.up
     add_column    :active_admin_comments, :namespace, :string
     add_index     :active_admin_comments, [:namespace]
     add_index     :active_admin_comments, [:author_type, :author_id]
-
-    # Update all the existing comments to the default namespace
-    say "Updating any existing comments to the #{ActiveAdmin.application.default_namespace} namespace."
-    comments_table_name = ActiveRecord::Migrator.proper_table_name("active_admin_comments")
-    execute "UPDATE #{comments_table_name} SET namespace='#{ActiveAdmin.application.default_namespace}'"
   end
 
   def self.down