Remove GDAL dependency?

[Mark Harris]

Does this repo depend on GDAL other than for cuSpatial? cuSpatial dropped its GDAL dep, so perhaps remove it here as well? References:

https://github.com/search?q=repo%3Arapidsai%2Fnode%20gdal&type=code

[Paul Taylor]

Yep, I plan to do that when node-rapids updates to 23.04/6