Even if you disable the 'Allow' option for Good Job! and comments by viewers in the folder settings, any past posted comments and Good Job! will remain.
Note:
- Viewers cannot see the content of comments and Good Job!
- Editors can view the content of comments and Good Job! by all users.
Related: Enable viewer comments / "Good Job!" function (Web Browser)
https://teachme.jp/8/manuals/8796916