Delete QNL rows with access restrictions.

[jacobthill]

Some QNL records have access restrictions. We need to delete these in a post harvest task. We could add a remove_restricted_records function that looks for 'Copyright or data protection restrictions' or 'حقوق النشر أو قيود حماية البيانات' in the accessCondition column and deletes the rows if that column contains either of those strings. Exact match won't work since some values may longer.