Where did you hear that? I haven't seen any rumblings about it, but I would hate to see it happen. I think it's pretty doubtful since it has quite a few popular shows on it. I could maybe see a name change/rebranding, but I don't think they will get rid of it.
I'm not really sure what's going on with Disney XD. Star vs the Forces of Evil, DuckTales and Big Hero 6 have moved over to the Disney Channel. The new Star Wars is going to be on Disney Channel too (Rebels was XD).
When does Star move? Also, I think they said that Star Wars Resistance would only have it's pilot on Disney Channel and would be Disney XD afterwards. That show's such a long way off though that things could change.