REVOKE Permissions command
See the following article for more information:
The REVOKE Permissions command allows you to reduce permissions of users by removing the the indicated role from the current folder or subfolder.
To fully remove a user from the folder, use the REVOKE ALL command.
REVOKE <EDITOR|VIEWER|ALL> ON <"folder|path" | HERE> TO "email1", "email2"
Example
REVOKE EDITOR ON HERE TO "example@gmail.com", "example2@example.com";
REVOKE VIEWER ON "Path|To" TO "example4@example.com", "example5@example.com";
REVOKE ALL ON "Path|To" TO "example4@example.com", "example5@example.com";