Issue #3293431 by longwave: Remove obsolete AppRootFactory and SitePathFactory

(cherry picked from commit 9abad5716084f2ec3a27c6597c16abb0311897e6)

core/lib/Drupal/Core/AppRootFactory.php

-<?php
-
-namespace Drupal\Core;
-
-/**
- * Gets the app root from the kernel.
- */
-class AppRootFactory {
-
-  /**
-   * The Drupal kernel.
-   *
-   * @var \Drupal\Core\DrupalKernelInterface
-   */
-  protected $drupalKernel;
-
-  /**
-   * Constructs an AppRootFactory instance.
-   *
-   * @param \Drupal\Core\DrupalKernelInterface $drupal_kernel
-   *   The Drupal kernel.
-   */
-  public function __construct(DrupalKernelInterface $drupal_kernel) {
-    $this->drupalKernel = $drupal_kernel;
-  }
-
-  /**
-   * Gets the app root.
-   *
-   * @return string
-   *   The app root.
-   */
-  public function get() {
-    return $this->drupalKernel->getContainer()->getParameter('app.root');
-  }
-
-}

core/lib/Drupal/Core/SitePathFactory.php

-<?php
-
-namespace Drupal\Core;
-
-/**
- * Gets the site path from the kernel.
- */
-class SitePathFactory {
-
-  /**
-   * The Drupal kernel.
-   *
-   * @var \Drupal\Core\DrupalKernelInterface
-   */
-  protected $drupalKernel;
-
-  /**
-   * Constructs a SitePathFactory instance.
-   *
-   * @param \Drupal\Core\DrupalKernelInterface $drupal_kernel
-   *   The Drupal kernel.
-   */
-  public function __construct(DrupalKernelInterface $drupal_kernel) {
-    $this->drupalKernel = $drupal_kernel;
-  }
-
-  /**
-   * Gets the site path.
-   *
-   * @return string
-   *   The site path.
-   */
-  public function get() {
-    return $this->drupalKernel->getContainer()->getParameter('site.path');
-  }
-
-}