Cleanup possible dead code from old Run Pipeline form

Description

It is possible that this code needs to be cleaned:

app/assets/javascripts/pages/projects/pipelines/new/index.js

import $ from 'jquery';
import setupNativeFormVariableList from '~/ci_variable_list/native_form_variable_list';
import NewBranchForm from '~/new_branch_form';
import initNewPipeline from '~/pipeline_new/index';

const el = document.getElementById('js-new-pipeline');

if (el) {
  initNewPipeline();
} else {
  new NewBranchForm($('.js-new-pipeline-form')); // eslint-disable-line no-new <----- POSSIBLY REMOVE THIS PATH 

  setupNativeFormVariableList({
    container: $('.js-ci-variable-list-section'),
    formField: 'variables_attributes',
  });
}

The else block is possibly not used anymore.