Issue #3246036: Remove PreStartEvent in favor of PreCreateEvent

src/Event/PackagesAwareTrait.php

-<?php
-
-namespace Drupal\automatic_updates\Event;
-
-/**
- * Common functionality for events which can carry desired package versions.
- */
-trait PackagesAwareTrait {
-
-  /**
-   * The desired package versions to update to, keyed by package name.
-   *
-   * @var string[]
-   */
-  protected $packageVersions;
-
-  /**
-   * Returns the desired package versions to update to.
-   *
-   * @return string[]
-   *   The desired package versions to update to, keyed by package name.
-   */
-  public function getPackageVersions(): array {
-    return $this->packageVersions;
-  }
-
-}