[Doc][C++] Is arrow::dataset namespace still experimental ?

[rouault]

Describe the enhancement requested

https://arrow.apache.org/docs/cpp/dataset.html has this warning "The arrow::dataset namespace is experimental, and a stable API is not yet guaranteed." . This was added 3 years ago per 6f2e05d
The GDAL Parquet driver has been using (part of) this API for 2 years now, and I don't recall any backward incompatible change in what we used, so it seems to me that this is fairly stable, and the warning could probably be dropped

Component(s)

C++, Documentation

[jorisvandenbossche]

I would assume the warning can indeed be dropped (at least in general, there might still be some individual newer APIs that could be marked as experimental).

cc @westonpace

[westonpace]

+1, this API is no longer experimental