DOCSP-49013 remove In-use Encryption from landing page

Author: mballard-mdb

source/index.txt

@@ -94,12 +94,6 @@ Use Builders API
 
 Learn how to work with the builder operation helpers in the :ref:`kotlin-sync-builders` section.
 
-In-Use Encryption
------------------
-
-Learn how to use in-use encryption to encrypt your MongoDB data in the
-:ref:`In-Use Encryption <kotlin-sync-fle>` section.
-
 Compatibility
 -------------