All other exchange usually tell in front if a coin is about delisted.
Why not hitbtc?
I am not a not at all a fan of HitBTC anyway, but I believe they should have a channel with which they tend to inform on the coins they are possibly delisting and they won't just delist like that without doing so. I will not be surprised if there is none, it is HitBTC and they actually do not even have a proper framework of doing things, except that they are just there to keep cheating their users and they are so unprofessional with a lot of things. I will advise though that you go through their blogs if they have one, and then see if you can get any delisting news to subscribe to.
its unprofessional way to remove any coins in their platform without any further notice, well they don't have any in the first place.
Up till date, with all the things being said about HitBTC, I still wonder why a lot of people still get to make use of HitBTC, after series of complaints on how they have been doing things unprofessionally and even in an alarming ways. I thought they even have social media to at least pass across these messages unless the OP did not check. However, while using Google search engine, I noticed there is no single information on that at all directly from HitBTC, and that basically adds more reason as to why people should stay away from this bullshit exchange.