Issue #3284092 by hooroomoo, narendraR: Remove unused svelte components and variables

<script context="module">

  let globalLabels;

  export function setLabels(labels) {

    globalLabels = labels;

  }

</script>

<script>

  import { createEventDispatcher, getContext, onMount } from 'svelte';

  import { moduleCategoryFilter, moduleCategoryVocabularies } from './stores';

  const dispatch = createEventDispatcher();

  const stateContext = getContext('state');

  export const filter = (row, text) =>

    Object.values(row).filter(

      (item) => item.toString().toLowerCase().indexOf(text.toLowerCase()) > 1,

    ).length > 0;

  export const index = -1;

  export const text = '';

  export const labels = {

    placeholder: `${Drupal.t('Title contains')}...`,

    ...globalLabels,

  };

  async function onSelectCategory(event) {

    const state = stateContext.getState();

    const detail = {

<script context="module">

  let globalLabels;

  export function setLabels(labels) {

    globalLabels = labels;

  }

</script>

<script>

  import { createEventDispatcher, getContext } from 'svelte';

    last: Drupal.t('Last'),

    next: Drupal.t('Next'),

    previous: Drupal.t('Previous'),

    ...globalLabels,

  };

  $: pageCount = Math.floor(count / pageSize);