Drop nodes.external_url

The column moved to page.rb and was now written only by publish_draft!
and by the chapter seed, and read by nothing.

lib/tasks/pages.rake goes with it. backfill_external_url reads the dropped
column. backfill_address is spent and no longer safe to re-run.

1 files changed, 0 insertions, 2 deletions

diff --git a/app/models/node.rb b/app/models/node.rb
index a401ed69..6fc6c3dc 100644
--- a/app/models/node.rb
+++ b/app/models/node.rb
@@ -257,8 +257,6 @@ class Node < ApplicationRecord
         self.slug = self.head.slug
       end
 
-      self.external_url = self.head.external_url
-
       if self.head.parent_node_id && self.head.parent_node_id != parent_id
         new_parent = Node.find_by(:id => self.head.parent_node_id)