DOCSP-28154 Remove Steps to encrypt backup snapshots for 4.2 & later (#324)

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- [DOCSP-28154](https://jira.mongodb.org/browse/DOCSP-28154)
-
[STAGING](https://deploy-preview-324--10gen-docs-ops-manager.netlify.app/tutorial/encrypt-snapshots/#encrypt-your-backup-job)
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Author: kanchana-mongodb

source/tutorial/encrypt-snapshots.txt

@@ -24,28 +24,14 @@ clusters.
    .. tab:: FCV 4.2 or later
       :tabid: fcv42
 
-      |mms| can encrypt any backup job that it had stored in a
-      snapshot store. The snapshot must come from a database that
-      ran
-      :product:`MongoDB Enterprise <mongodb-enterprise-advanced>`
-      4.2 or later with:
-
-      - |fcv-link| of 4.2 or later and
-      - :ref:`WiredTiger <encrypted-storage-engine>` storage engine.
-
-
-      .. warning:: 
-         
-         .. include:: /includes/facts/fcv-transitioning-from-keyfile-to-KMIP-considerations.rst
+      |mms| doesn't encrypt backup snapshots for clusters running
+      MongoDB 4.2 or later because you can create encrypted snapshots
+      only from encrypted clusters.
 
       .. note::
 
          .. include:: /includes/facts/fcv-backup-considerations.rst
 
-      To encrypt backups, use a master key that a |kmip|-compliant
-      key management appliance generates and maintains. This master
-      key encrypts key that encrypts the database.
-
       .. include:: /includes/facts/how-mms-takes-fcv42-encrypted-snapshots.rst
 
       .. important::
@@ -149,7 +135,10 @@ Encrypt Your Backup Job
    .. tab:: FCV 4.2 or later
       :tabid: fcv42
 
-      .. include:: /includes/steps/enable-encryption-fcv42.rst
+      You can create encrypted snapshots only from encrypted clusters.
+      If you enable MongoDB Encryption at Rest for the host you are
+      backing up, the bytes that |mms| copies to the snapshot
+      store are already encrypted. 
 
    .. tab:: FCV 4.0 or earlier
       :tabid: fcv40
@@ -161,4 +150,3 @@ Encrypt Your Backup Job
          head databases.
 
       .. include:: /includes/steps/enable-backup.rst
-