Desejo remover o rótulo "Acompanhamento" de cada mensagem colocada de volta na caixa de entrada. Eu tentei várias coisas, mas ainda sem sucesso. Espero que alguém possa me ajudar ou me apontar na direção certa. A função em questão é:

function moveToInbox(page) {
  GmailApp.moveThreadsToInbox(page);
//  GmailApp.markThreadsUnread(page);
//  GmailApp.starMessages(page)
  var label = GmailApp.getUserLabelByName("FollowUp");
  var firstThread = GmailApp.getInboxThreads(0,1)[0];
  var coupleOfMessages = firstThread.getMessages().slice(0, 10);
  GmailApp.starMessages(coupleOfMessages);
  label.removeFromThread(firstThread);
}

O script inteiro é:

function getLabelName(i, labelSuffixString) {
  return "FollowUp/" + i + labelSuffixString;
}

function setup() {
  for (var i = 1; i <= 7; ++i) {
    GmailApp.createLabel(getLabelName(i, "days"));
    GmailApp.createLabel(getLabelName(i, "weeks"));
  }
  GmailApp.createLabel("FollowUp");
}

function moveToInbox(page) {
  GmailApp.moveThreadsToInbox(page);
//  GmailApp.markThreadsUnread(page);
//  GmailApp.starMessages(page)
  var label = GmailApp.getUserLabelByName("FollowUp");
  var firstThread = GmailApp.getInboxThreads(0,1)[0];
  var coupleOfMessages = firstThread.getMessages().slice(0, 10);
  GmailApp.starMessages(coupleOfMessages);
  label.removeFromThread(firstThread);
}

function cleanOldFollowUpLabels() {
  var searchString = "-label:inbox label:FollowUp";
  for (var i = 1; i <= 7; ++i) {
    searchString += " -label:" + getLabelName(i, "days");
    searchString += " -label:" + getLabelName(i, "weeks");
  }
  searchString = searchString.replace(RegExp("/", "g"), "-");
  Logger.log("cleanOldFollowUpLabels() Search String:");
  Logger.log(searchString);
  var followUpLabel = GmailApp.getUserLabelByName("FollowUp");  
  var page = null;
  // Get threads in "pages" of 100 at a time
  while(!page || page.length == 100) {
    page = GmailApp.search(searchString, 0, 100);
    Logger.log("found: " + page.length);
    if (page.length > 0)
      followUpLabel.removeFromThreads(page);   
  }
}

function update(labelSuffixString) {
  var oldLabel, newLabel, page;
  var followUpLabel = GmailApp.getUserLabelByName("FollowUp");
  for (var i = 1; i <= 7; ++i) {
    newLabel = oldLabel;
    oldLabel = GmailApp.getUserLabelByName(getLabelName(i, labelSuffixString));
    page = null;
    // Get threads in "pages" of 100 at a time
    while(!page || page.length == 100) {
      page = oldLabel.getThreads(0, 100);
      if (page.length > 0) {
        followUpLabel.addToThreads(page);
        if (newLabel) {
          // Move the threads into "today’s" label
          newLabel.addToThreads(page);
        } else {
          moveToInbox(page);
        }     
        // Move the threads out of "yesterday’s" label
        oldLabel.removeFromThreads(page);
        // Wait for a minute to prevent timeout errors
        Utilities.sleep(1000);
      }  
    }
  }
}

function dailyUpdate() {
  update("days");
}
function weeklyUpdate() {
  update("weeks");
}