Even if they were removed, they could easily return in the future.
Gamefreak makes a habit out of removing a bunch of features, then bringing them back full blast later on.
Case in point, Pokemon movement & Night/Day.
Seasons were fine. The only bummy thing was that it ruined Night/Day's relevance for wild Pokemon. No night-only Pokemon or anything.
The only real Pokemon that took advantage of it was Deerling/Sawsbuck, and then you had stuff like Winter-exclusive Pokemon. They really should have done more with it.