Use rm -rf to remove project dir on upgrade?

[LourensVeen]

We're currently deleting the project directory of a project for which there's an update available using Cerulean's rmdir(). This works fine, but because SFTP doesn't have a recursive delete command, Cerulean has to walk the entire tree over the network connection, which means that something like a miniconda install, with lots of small files, takes 3 minutes to delete.

Since we're already running install.sh via the shell, we might as well use rm -rf to delete the project directory, which should be a lot faster. Perhaps we can still have a fallback to rmdir() if it fails somehow?