Remove psr logger interface.

- PHP Fatal error:  Type of Drupal\dgi_fixity\Commands\FixityCheck::$logger must be ?Psr\Log\LoggerInterface (as in class Drush\Commands\DrushCommands) in /var/www/html/drupal/web/modules/contrib/dgi_fixity/src/Commands/FixityCheck.php on line 16

src/Commands/FixityCheck.php

@@ -17,13 +17,6 @@ class FixityCheck extends DrushCommands {
 
   use StringTranslationTrait;
 
-  /**
-   * A logger instance.
-   *
-   * @var \Psr\Log\LoggerInterface
-   */
-  protected $logger;
-
   /**
    * The entity type manager.
    *