First time a game is being removed since FIFA 14. In FIFA 14's case 15, 16 and 17 were already in the Vault as well as a trial for 18. With Rory McIlroy PGA Tour there is no other golf replacement on the service. I assume it's licence issues so hopefully not a sign of things to come.
https://www.ea.com/ea-access/news/rory-mcilroy-pga-tour-will-leave-ea-access-on-may-22
Unfortunately, we have to announce that EA SPORTS™Rory McIlroy PGA TOUR® will soon be removed from digital storefronts and will no longer be available for purchase. It will also be leaving the EA Access Vault on May 22, 2018.
https://www.ea.com/ea-access/news/rory-mcilroy-pga-tour-will-leave-ea-access-on-may-22