How to use the dojo/dom-class.remove function in dojo

}).then(res => {
      this.dispatch(res);
      domClass.remove('layer-modal', 'hidden');
    }, err => {
      // this.dispatch({});

storiesLayer.applyEdits([storyAffectedArea], null, null, function(msg) {
      console.log(msg);
      domClass.remove('success-modal', 'hidden');
    }, function(err) {
      console.log('err');

const isComplete = this._wu && this._wu.isComplete();
        this.setDisabled(this.id + "Analyze", !!this._wu);
        d3Select(`#${this.id}TargetSelectLabel`).style("color", !!this._wu ? "rgb(158,158,158)" : null);
        this.setDisabled(this.id + "TargetSelect", !!this._wu);
        this.setDisabled(this.id + "Delete", !this._wu);
        this.setDisabled(this.id + "OptimizeDropDown", !isComplete);
        this.setDisabled(this.id + "_RawData", !isComplete);
        this.setDisabled(this.id + "_Workunit", !this._wu);

        if (this._wu) {
            this.targetSelectWidget.set("value", this._wu.Cluster);
        }

        const stateIconClass = this._wu ? getStateIconClass(this._wu.StateID, this._wu.isComplete(), this._wu.Archived) : "";
        this.workunitWidget.set("iconClass", stateIconClass);
        domClass.remove(this.id + "StateIdImage");
        domClass.add(this.id + "StateIdImage", stateIconClass);

        d3Select(`#${this.id}WU`).style("display", isComplete ? "none" : null);

        const msg = [];
        if (!this._wu) {
            msg.push(this.i18n.DataPatternsNotStarted);
        } else if (!this._wu.isComplete()) {
            msg.push(this.i18n.DataPatternsStarted);
        }

        const dpMessage = d3Select(`#${this.id + "DPReport"}`).selectAll(".DPMessage").data(msg);
        dpMessage.enter().insert("p", ":first-child")
            .attr("class", "DPMessage")
            .style("text-align", "center")
            .merge(dpMessage as any)

showSearchModal () {
    app.debug('ModalActions >>> showSearchModal');
    domClass.remove('search-modal', 'hidden');
  }

showBasemapModal () {
    app.debug('ModalActions >>> showBasemapModal');
    let currentCookie = cookie('windBasemapDecision');
    if (currentCookie === undefined) {
      domClass.remove('basemap-modal', 'hidden');
    } else {
      if (currentCookie === 'true') { //change basemap
        this.dispatch('dark-gray');
      }
    }
  }

storyTitle = dom.byId('story-title-input').value;
  storyLocation = dom.byId('story-location-input').value;
  storyDate = dom.byId('story-date-input').value || '';
  storyDetails = dom.byId('story-details-textarea').value;
  storyVideo = dom.byId('story-video-input').value;
  //storyMedia = dom.byId('story-media-input').value;
  storyName = dom.byId('story-title-input').value;
  storyEmail = dom.byId('story-email-input').value;

  storyTitleValid = storyTitle !== '';
  storyAffectedAreaValid = storyAffectedArea !== undefined;
  storyEmailValid = storyEmail !== '' && validateWeb.isEmailAddress(storyEmail) === true;

  if (storyTitleValid) {
    domClass.remove('story-title-label', 'field-required');
  } else {
    domClass.add('story-title-label', 'field-required');
  }

  if (storyAffectedAreaValid) {
    domClass.remove('story-affected-areas-label', 'field-required');
  } else {
    domClass.add('story-affected-areas-label', 'field-required');
  }

  if (storyEmailValid) {
    domClass.remove('story-email-label', 'field-required');
  } else {
    domClass.add('story-email-label', 'field-required');
  }

showCanopyModal () {
    app.debug('ModalActions >>> showCanopyModal');
    domClass.remove('canopy-modal', 'hidden');
  }

showSubscribeModal (graphic) {
    app.debug('ModalActions >>> showAlertsModal');
    this.dispatch(graphic);
    domClass.remove('subscription-modal', 'hidden');
  }

showFiresModal () {
    app.debug('ModalActions >>> showFiresModal');
    domClass.remove('fires-modal', 'hidden');
  }

storyEmailValid = storyEmail !== '' && validateWeb.isEmailAddress(storyEmail) === true;

  if (storyTitleValid) {
    domClass.remove('story-title-label', 'field-required');
  } else {
    domClass.add('story-title-label', 'field-required');
  }

  if (storyAffectedAreaValid) {
    domClass.remove('story-affected-areas-label', 'field-required');
  } else {
    domClass.add('story-affected-areas-label', 'field-required');
  }

  if (storyEmailValid) {
    domClass.remove('story-email-label', 'field-required');
  } else {
    domClass.add('story-email-label', 'field-required');
  }

  if (storyTitleValid === false) {
    focusUtil.focus(dom.byId('story-title-input'));
  } else if (storyAffectedAreaValid === false) {
    dom.byId('story-affected-areas-label').scrollIntoView();
  } else if (storyEmailValid === false) {
    focusUtil.focus(dom.byId('story-email-input'));
  }

  if (storyTitleValid &&
    storyEmailValid &&
    storyAffectedAreaValid) {