Check for unused privates

[MAILPOET-2090]

lib/Cron/Daemon.php

@@ -9,15 +9,11 @@ if (!defined('ABSPATH')) exit;
 class Daemon {
   public $timer;
 
-  /** @var SettingsController */
-  private $settings_controller;
-
   /** @var WorkersFactory */
   private $workers_factory;
 
-  function __construct(SettingsController $settings_controller, WorkersFactory $workers_factory) {
+  function __construct(WorkersFactory $workers_factory) {
     $this->timer = microtime(true);
-    $this->settings_controller = $settings_controller;
     $this->workers_factory = $workers_factory;
   }