Remove \MailPoet\Tasks\Subscribers class now that it is not used anymore

[MAILPOET-4368]

mailpoet/lib/Tasks/Sending.php

@@ -39,9 +39,6 @@ class Sending {
   /** @var SendingQueue */
   private $queue;
 
-  /** @var Subscribers */
-  private $taskSubscribers;
-
   private $queueFields = [
     'id',
     'task_id',
@@ -94,7 +91,6 @@ class Sending {
 
     $this->task = $task;
     $this->queue = $queue;
-    $this->taskSubscribers = new Subscribers($task);
     $this->scheduledTaskSubscribersRepository = ContainerWrapper::getInstance()->get(ScheduledTaskSubscribersRepository::class);
     $this->scheduledTasksRepository = ContainerWrapper::getInstance()->get(ScheduledTasksRepository::class);
     $this->sendingQueuesRepository = ContainerWrapper::getInstance()->get(SendingQueuesRepository::class);
@@ -245,10 +241,6 @@ class Sending {
     return $this->task;
   }
 
-  public function taskSubscribers() {
-    return $this->taskSubscribers;
-  }
-
   public function getSubscribers($processed = null) {
     if (is_null($processed)) {
       $subscribers = $this->scheduledTaskSubscribersRepository->findBy(['task' => $this->task->id]);

mailpoet/lib/Tasks/Subscribers.php

@@ -1,20 +0,0 @@
-<?php // phpcs:ignore SlevomatCodingStandard.TypeHints.DeclareStrictTypes.DeclareStrictTypesMissing
-
-namespace MailPoet\Tasks;
-
-use MailPoet\Models\ScheduledTask;
-use MailPoet\Models\ScheduledTaskSubscriber;
-
-class Subscribers {
-  private $task;
-
-  public function __construct(
-    ScheduledTask $task
-  ) {
-    $this->task = $task;
-  }
-
-  public function getSubscribers() {
-    return ScheduledTaskSubscriber::where('task_id', $this->task->id);
-  }
-}

mailpoet/tests/integration/Tasks/SendingTest.php

@@ -10,7 +10,6 @@ use MailPoet\Models\SendingQueue;
 use MailPoet\Newsletter\Sending\ScheduledTasksRepository;
 use MailPoet\Newsletter\Sending\ScheduledTaskSubscribersRepository;
 use MailPoet\Tasks\Sending as SendingTask;
-use MailPoet\Tasks\Subscribers;
 use MailPoet\Test\DataFactories\Newsletter as NewsletterFactory;
 use MailPoet\Test\DataFactories\Subscriber as SubscriberFactory;
 use MailPoet\WP\Functions as WPFunctions;
@@ -66,7 +65,6 @@ class SendingTest extends \MailPoetTest {
     verify($sending)->instanceOf(SendingTask::class);
     verify($sending->queue())->instanceOf(SendingQueue::class);
     verify($sending->task())->instanceOf(ScheduledTask::class);
-    verify($sending->taskSubscribers())->instanceOf(Subscribers::class);
   }
 
   public function testItCanBeConstructedOnlyWithAProperTaskType() {