updating testing procs

RoboFile.php

@@ -84,11 +84,6 @@ public function testFull(int $drupal_version = 10, string $site_name = NULL) {
     $this->testAllowPlugins($site_name, $drupal_version);
     $this->testPhpVersion($site_name, $drupal_version);
 
-    // If received Drupal 10, upgrade the recently created site to Drupal 10.
-    if ($drupal_version === 10) {
-      // @todo Make it downgrade to Drupal 9 when Drupal 10 becomes the default version.
-      $this->testUpgradeToDrupal10($site_name);
-    }
 
     // Composer require the corresponding modules, push to Pantheon and install the site.
     $this->testRequireSolr($site_name, $constraint);
@@ -345,106 +340,6 @@ public function testAllowPlugins(string $site_name, int $drupal_version) {
     }
   }
 
-  /**
-   * Upgrade given site to Drupal 10.
-   *
-   * @param string $site_name
-   *   The machine name of the site to downgrade.
-   */
-  public function testUpgradeToDrupal10(string $site_name) {
-    $site_folder = $this->getSiteFolder($site_name);
-    chdir($site_folder);
-
-    // Remove composer lock.
-    $this->taskExec('rm')
-      ->args('composer.lock')
-      ->run();
-
-    $this->taskExec('composer')
-      ->args(
-        'config',
-        'minimum-stability',
-        'dev'
-      )
-      ->run();
-
-    $this->taskExec('composer')
-      ->args(
-        'config',
-        'platform.php',
-        '8.1'
-      )
-      ->run();
-
-    $this->taskExec('composer')
-      ->args(
-        'require',
-        '--no-update',
-        'drupal/core-recommended:^10',
-        'drupal/core-project-message:^10',
-        'drupal/core-composer-scaffold:^10',
-        'pantheon-systems/drupal-integrations:^10',
-        'mglaman/composer-drupal-lenient'
-      )
-      ->run();
-
-    $this->taskExec('composer')
-      ->args(
-        'require',
-        '--no-update',
-        '--dev',
-        'drupal/core-dev:^10'
-      )
-      ->run();
-
-    $this->taskExec('composer')
-      ->args('update')
-      ->run();
-
-    $this->taskExec('composer')
-        ->args(
-          'config',
-          '--merge',
-          '--json',
-          'extra.drupal-lenient.allowed-list',
-          '["drupal/search_api_pantheon"]'
-        )
-        ->run();
-    return ResultData::EXITCODE_OK;
-  }
-
-  /**
-   * Downgrade given site to Drupal 8.
-   *
-   * @param string $site_name
-   *   The machine name of the site to downgrade.
-   */
-  public function testDowngradeToDrupal8(string $site_name) {
-    $site_folder = $this->getSiteFolder($site_name);
-    chdir($site_folder);
-
-    // Remove composer lock.
-    $this->taskExec('rm')
-      ->args('composer.lock')
-      ->run();
-
-
-    $this->taskExec('composer')
-      ->args(
-        'require',
-        '--no-update',
-        '-W',
-        'drupal/core-recommended:^8',
-        'pantheon-systems/drupal-integrations:^8'
-      )
-      ->run();
-
-    $this->taskExec('composer')
-      ->args('update')
-      ->run();
-    return ResultData::EXITCODE_OK;
-  }
-
   /**
    * Composer require the Solr related modules.
    *