Issue #3447608: Remove declaration of WebformSubmissionDevelGenerate::$entityTypeManager

This will be inherited from the parent class.

src/Plugin/DevelGenerate/WebformSubmissionDevelGenerate.php

@@ -52,13 +52,6 @@ class WebformSubmissionDevelGenerate extends DevelGenerateBase implements Contai
    */
   protected $database;
 
-  /**
-   * The entity type manager.
-   *
-   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
-   */
-  protected $entityTypeManager;
-
   /**
    * The webform submission generation service.
    *