This program removes all files that belong to a given PostgreSQL cluster; that includes the data, wal,
and tablespace directories, the log file, and all configuration files that were created by
pg_createcluster(1). If the configuration directory (/etc/postgresql/version/cluster) is empty after
this, it is removed as well. An empty socket directory other than /var/run/postgresql or /tmp is also
removed.
Usually a cluster which still has a running server attached will not be deleted. To override this, the
--stop option forces a server shutdown before the files are removed.