clean up "only only"
Signed-off-by: Tim <elatllat@gmail.com>
:ref:`Cephadm <cephadm>` installs and manages a Ceph cluster using containers and
systemd, with tight integration with the CLI and dashboard GUI.
-* cephadm only supports only Octopus and newer releases.
+* cephadm only supports Octopus and newer releases.
* cephadm is fully integrated with the new orchestration API and
fully supports the new CLI and dashboard features to manage
cluster deployment.