Stop checking if website is on HTTPS for 1-click-unsubscribe

[MAILPOET-4859]

mailpoet/lib/Router/Endpoints/Subscription.php

@@ -116,9 +116,6 @@ class Subscription {
   }
 
   private function applyOneClickUnsubscribeStrategy($data): void {
-    if (!$this->wp->wpIsSiteUrlUsingHttps()) {
-      return;
-    }
     $subscription = $this->initSubscriptionPage(UserSubscription\Pages::ACTION_UNSUBSCRIBE, $data);
     $subscription->unsubscribe(StatisticsUnsubscribeEntity::METHOD_ONE_CLICK);
   }