When a workspace is no longer in use, elimintate it using the manager-destroy-workspace c8_client command.
c8_client [--config=<config file>] --cmd=manager-destroy-workspace --server-uri=<server-uri> --workspace-name=<workspace-name> [--unload-programs-flag=<unload-programs-flag>]
This command should be on a single line. It is split across multiple lines here for readability.
This command takes the same parameters as the manager-create-workspace takes.