diskless(8): remove references to deleted clone_root script

The clone_root script was removed from the tree in commit
7736786b08 but the diskless(8) man page still referenced it
in two places. Remove both references.

PR: 292231
Signed-off-by: Kit Dallege <xaum.io@gmail.com>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/2101

share/man/man8/diskless.8

@@ -27,7 +27,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd August 11, 2024
+.Dd June 9, 2026
 .Dt DISKLESS 8
 .Os
 .Sh NAME
@@ -179,10 +179,7 @@ can contain the following lines:
 where
 .Aq ROOT
 is the mount point on the server of the root partition.
-The script
-.Pa /usr/share/examples/diskless/clone_root
-can be used to create a shared read-only root partition,
-but in many cases you may decide to export
+In many cases you may decide to export
 (again as read-only) the root directory used by
 the server itself.
 .It
@@ -219,10 +216,6 @@ and
 have the obvious meanings.
 .It
 A properly initialized root partition.
-The script
-.Pa /usr/share/examples/diskless/clone_root
-can help in creating it, using the server's root partition
-as a reference.
 If you are just starting out, you should
 simply use the server's own root directory,
 .Pa / ,