DEV: Resolve TODO comments for martin-brennan

I am changing many of these to notes or resolving them as is,
most of these I have not actively worked on in years so someone
else can work on them when we get to these areas again.

lib/backup_restore/s3_backup_store.rb

@@ -53,9 +53,6 @@ module BackupRestore
       obj = s3_helper.object(filename)
       raise BackupFileExists.new if obj.exists?
 
-      # TODO (martin) We can remove this at a later date when we move this
-      # ensure CORS for backups and direct uploads to a post-site-setting
-      # change event, so the rake task doesn't have to be run manually.
       @s3_helper.ensure_cors!([S3CorsRulesets::BACKUP_DIRECT_UPLOAD])
 
       presigned_url(obj, :put, UPLOAD_URL_EXPIRES_AFTER_SECONDS)