Fix #61 - Add list of blocked users to the UI; clean up failed push notifications API

Try to fix Travis CI setup

app/services/notify_service.rb

@@ -10,7 +10,6 @@ class NotifyService < BaseService
 
     create_notification
     send_email if email_enabled?
-    send_push_notification
   rescue ActiveRecord::RecordInvalid
     return
   end
@@ -58,10 +57,6 @@ class NotifyService < BaseService
     NotificationMailer.send(@notification.type, @recipient, @notification).deliver_later
   end
 
-  def send_push_notification
-    PushNotificationWorker.perform_async(@notification.id)
-  end
-
   def email_enabled?
     @recipient.user.settings.notification_emails[@notification.type]
   end