Remove more notification migrations

db/migrate/20210701073944_add_digest_setting.rb

@@ -1,34 +1,12 @@
 class AddDigestSetting < ActiveRecord::Migration[6.1]
   def up
-    insert_default_digest_channel
+    # No-op
   end
 
   def down
     remove_digest_channels
   end
 
-  def insert_default_digest_channel
-    execute <<~SQL
-      INSERT INTO
-        notification_settings
-        (user_id,
-         channel,
-         involved,
-         mentioned,
-         watched)
-      SELECT
-        id,
-        2,
-        true,
-        true,
-        true
-      FROM
-        users
-      WHERE
-        type = 'User'
-    SQL
-  end
-
   # Removes all digest channels. Includes non default channels as those might
   # also have been added not by the migration but in the cause of the functionality
   # the migration was added for.

db/migrate/20210914065555_cleanup_notifications.rb

@@ -55,25 +55,6 @@ class CleanupNotifications < ActiveRecord::Migration[6.1]
               where: "project_id IS NOT NULL",
               name: 'index_notification_settings_unique_project'
     end
-
-    # Set all channels to ian
-    execute <<~SQL.squish
-      UPDATE notification_settings SET channel = 0;
-    SQL
-
-    # Restore notification settings
-    execute <<~SQL.squish
-      INSERT INTO notification_settings
-        (project_id, user_id, channel, watched, involved, mentioned,
-        work_package_commented, work_package_created, work_package_processed, work_package_prioritized, work_package_scheduled)
-      SELECT project_id, user_id, channel + 1, watched, involved, mentioned,
-        work_package_commented, work_package_created, work_package_processed, work_package_prioritized, work_package_scheduled
-      FROM notification_settings
-      UNION
-      SELECT project_id, user_id, channel + 2, watched, involved, mentioned,
-        work_package_commented, work_package_created, work_package_processed, work_package_prioritized, work_package_scheduled
-      FROM notification_settings;
-    SQL
   end
   # rubocop:enable Metrics/AbcSize
 end