Issue #3471412: Remove unused properties

src/Plugin/PdfBackend/LocalServerPdfBackend.php

@@ -26,13 +26,6 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  */
 class LocalServerPdfBackend extends PdfBackendBase implements ContainerFactoryPluginInterface {
 
-  /**
-   * The file system.
-   *
-   * @var \Drupal\Core\File\FileSystemInterface
-   */
-  protected $fileSystem;
-
   /**
    * Constructs a LocalServerPdfBackend plugin object.
    *

tests/modules/fillpdf_test/src/Plugin/PdfBackend/TestPdfBackend.php

@@ -19,13 +19,6 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  */
 class TestPdfBackend extends PdfBackendBase implements ContainerFactoryPluginInterface {
 
-  /**
-   * The plugin's configuration.
-   *
-   * @var array
-   */
-  protected $configuration;
-
   /**
    * Constructs a LocalFillPdfBackend plugin object.
    *