unshareGoogleDriveFilesWithEmail

function unshareGoogleDriveFilesWithEmail() {
  const email = "your-email";             //อีเมลของคนที่อยากลืม
  const folderId = "folderId";            //ใส่ไอดีโฟลเดอร์
  const files = DriveApp.getFolderById(folderId).getFiles();
  while (files.hasNext()) {
    var file = files.next();
    var editors = file.getEditors();
    var viewers = file.getViewers();
    for (i in editors) {
      emailEditor = editors[i].getEmail();
      if (emailEditor == email) {
        file.removeEditor(email);
      }
    }
    for (i in viewers) {
      emailViewers = viewers[i].getEmail();
      if (emailViewers == email) {
        file.removeViewer(email);
      }
    }
  }
}