(DOCSP-39052) Remove downgrading to 4.0 as links have been broken due to earlier removal of actual steps: backport to 7.0 (#182)

Backport of (#181) Remove downgrading files and tab for 4.0 due to previously removed steps. Fix one build error by removing a reference to a very old and removed changelog.

Author: JuliaMongo

source/includes/considerations-change-mongodb-version.rst

@@ -25,7 +25,3 @@
 
    - From version 5.0 to any version before 4.4.0
    - From version 4.4 to any version before 4.2.6
-   - From version 4.2 to any version 4.0.12 (for Windows) or 4.0.7 
-     (for Linux)
-   - From version 4.0 to any version before 3.6.23
-

source/includes/steps-remove-incompat-features-42-40.yaml

@@ -380,8 +380,8 @@ Backup
 
      On Windows, :doc:`queryable restores </tutorial/query-backup/>`
      work on MongoDB 3.2, 3.4, and 3.6 snapshots once the |onprem|
-     :opsmgr:`Backup Daemon </reference/glossary/#std-term-backup-daemon>` can access
-     :ref:`MongoDB 3.4.11 <3.4.11-changelog>` or later.
+     :opsmgr:`Backup Daemon </reference/glossary/#std-term-backup-daemon>`
+     can access MongoDB 3.4.11 or later.
 
 - Added support for IBM Cloud Object Storage and DellEMC Elastic Cloud
   Storage for S3 blockstore snapshot storage

source/release-notes/changelogs/ops-manager/changelog-onprem-v3.6.rst

@@ -60,12 +60,6 @@ manually downgrade the instance's :manual:`featureCompatibilityVersion</referenc
 
       .. include:: /includes/steps/remove-incompat-features-44-42.rst
 
-   .. tab:: 4.2 to 4.0
-      :tabid: four-two-to-four-oh
-
-      .. include:: /includes/steps/remove-incompat-features-42-40.rst
-
-
 Procedure
 ---------