Usage: vagrant box prune [options]
Options:
-p, --provider PROVIDER The specific provider type for the boxes to destroy.
-n, --dry-run Only print the boxes that would be removed.
--name NAME The specific box name to check for outdated versions.
-f, --force Destroy without confirmation even when box is in use.
-h, --help Print this help
These are plugins that ship with Vagrant. Vagrant core uses its own
plugin system to power a lot of the core pieces that ship with Vagrant.
Each plugin will have its own README which explains its specific role.