* Remove file_path_for, cropped_file_url (dead code)
* Remove complete_preview_file_url (preview_file_url now returns absolute links)
* Remove `file_name` (only used for Download link in sidebar)
DEPRECATION WARNING: You are calling a `*_path` helper with the
`only_path` option explicitly set to `false`. This option will stop
working on path helpers in Rails 5. Use the corresponding `*_url` helper
instead.
