doc: Remove the 400 snapshot limitation

The support for more than 400 snapshots was
added at: ceph/ceph#38553

This patch also removes the note regarding
deletion of PVCs with snapshots.

Closes: #4681

Signed-off-by: Niraj Yadav <niryadav@redhat.com>

docs/snap-clone.md

@@ -42,10 +42,6 @@
     ./scripts/install-snapshot.sh cleanup
     ```
 
-**NOTE: At present, there is a limit of 400 snapshots per cephFS filesystem.
-Also PVC cannot be deleted if it's having snapshots. Make sure all the snapshots
-on the PVC are deleted before you delete the PVC.**
-
 ## Create CephFS Snapshot and Clone Volume
 
 ### Create CephFS SnapshotClass