Remove EventSubscriberInterface from ExportStorageManager and remove StorageRebuildNeededEvent

+1 for this change. Less moving parts. If we discover later that we need to add something like this then we can.

1. +++ b/core/modules/config_environment/src/Core/Config/ExportStorageManager.php
   @@ -21,15 +21,10 @@
     *
     * @internal
     */
   -class ExportStorageManager implements StorageManagerInterface, EventSubscriberInterface {
   +class ExportStorageManager implements StorageManagerInterface {

   Minor. Remove use statement for EventSubscriberInterface.

2. -  public function __construct(StorageInterface $active, StateInterface $state, Connection $connection, EventDispatcherInterface $event_dispatcher) {
   +  public function __construct(StorageInterface $active, Connection $connection, EventDispatcherInterface $event_dispatcher) {

   Minor. Remove use statement for StateInterface.

3. -   * @param \Drupal\Core\State\StateInterface $state
   -   *   The Drupal state.
       */
   -  public function __construct(StorageInterface $active_storage, Settings $settings, ConfigManagerInterface $manager, StateInterface $state) {

   Minor. Remove use statement for StateInterface

4. -   * @param \Drupal\Core\Config\StorageRebuildNeededEvent $event
   -   *   The event to control the storage rebuild.
   -   */
   -  public function onExportStorageNeedsRebuild(StorageRebuildNeededEvent $event) {

   Minor. Remove use statement for StorageRebuildNeededEvent.

5. -    // Save the config to trigger the rebuild.
   +    // Save the config to test transforming always the active config.
        $this->config('system.site')
          ->set('name', 'New name')
          ->set('slogan', 'New slogan')

   Minor. Comment is a bit unclear. I'd put just something like: Save the config to active storage so that the transformer can alter it.

-- edited --

Changes according to #4.

This can also be removed.

Committed 3f4d403 and pushed to 8.8.x. Thanks!

diff --git a/core/modules/config_environment/src/Core/Config/ConfigEvents.php b/core/modules/config_environment/src/Core/Config/ConfigEvents.php
index c932984ba6..8a87c54a93 100644
--- a/core/modules/config_environment/src/Core/Config/ConfigEvents.php
+++ b/core/modules/config_environment/src/Core/Config/ConfigEvents.php
@@ -71,7 +71,6 @@ final class ConfigEvents {
    *
    * @see \Drupal\Core\Config\StorageTransformEvent
    * @see \Drupal\Core\Config\ConfigEvents::STORAGE_TRANSFORM_IMPORT
-   * @see \Drupal\Core\Config\ConfigEvents::STORAGE_EXPORT_REBUILD
    * @see \Drupal\config_environment\Core\Config\ExportStorageManager::getStorage
    *
    * @var string

Removed @see to removed constant on commit.

3f4d403 returns "Git Resource Not found" and I don't see this commit on https://git.drupalcode.org/project/drupal/commits/8.8.x.

Back to RTBC due to #10.

Thanks!