Remove unused free plugin connector service

[MAILPOET-3077]

lib/DynamicSegments/FreePluginConnectors/AddToSubscribersFilters.php

@@ -1,66 +0,0 @@
-<?php
-
-namespace MailPoet\DynamicSegments\FreePluginConnectors;
-
-use MailPoet\DynamicSegments\Persistence\Loading\Loader;
-use MailPoet\DynamicSegments\Persistence\Loading\SubscribersCount;
-
-class AddToSubscribersFilters {
-
-  /** @var Loader */
-  private $loader;
-
-  /** @var SubscribersCount */
-  private $subscribersCountLoader;
-
-  public function __construct(Loader $loader, SubscribersCount $subscribersCountLoader) {
-    $this->loader = $loader;
-    $this->subscribersCountLoader = $subscribersCountLoader;
-  }
-
-  /**
-   * @param array $segmentFilters
-   *
-   * @return array
-   */
-  public function add(array $segmentFilters) {
-    $dynamicSegments = $this->getListings();
-    return $this->sort(array_merge($segmentFilters, $dynamicSegments));
-  }
-
-  private function getListings() {
-    $dynamicSegments = $this->loader->load();
-    return $this->buildResult($dynamicSegments);
-  }
-
-  private function buildResult($dynamicSegments) {
-    $result = [];
-    foreach ($dynamicSegments as $dynamicSegment) {
-      $result[] = [
-        'value' => $dynamicSegment->id,
-        'label' => sprintf(
-          '%s (%s)',
-          $dynamicSegment->name,
-          number_format($this->subscribersCountLoader->getSubscribersCount($dynamicSegment))
-        ),
-      ];
-    }
-    return $result;
-  }
-
-  private function sort($segmentFilters) {
-    $specialSegmentFilters = [];
-    $segments = [];
-    foreach ($segmentFilters as $segmentFilter) {
-      if (is_numeric($segmentFilter['value'])) {
-        $segments[] = $segmentFilter;
-      } else {
-        $specialSegmentFilters[] = $segmentFilter;
-      }
-    }
-    usort($segments, function ($a, $b) {
-      return strcasecmp($a["label"], $b["label"]);
-    });
-    return array_merge($specialSegmentFilters, $segments);
-  }
-}