Remove code that was deprecated in the 1.x series
When we release version 2.0.0 we should remove all (?) code that was deprecated in the 1.x series.
Really all? What about code that we deprecated in the very last 1.x version just a few days before releasing 2.0.0? I believe even that, because whoever updates from 1.x to 2.x knows that things might break. And even if they update from an earlier 1.x, they'll need to watch out for changes. But I could be convinced otherwise.