drop unnecessary linking to its own smaller definition.
Signed-off-by: Jos Collin <jcollin@redhat.com>
Ceph Filesystem
=================
-The :term:`Ceph Filesystem` (Ceph FS) is a POSIX-compliant filesystem that uses
+The Ceph Filesystem (Ceph FS) is a POSIX-compliant filesystem that uses
a Ceph Storage Cluster to store its data. The Ceph filesystem uses the same Ceph
Storage Cluster system as Ceph Block Devices, Ceph Object Storage with its S3
and Swift APIs, or native bindings (librados).