fix build error on change streams page

Author: jeff-allen-mongo

source/administration/change-streams-production-recommendations.txt

@@ -84,18 +84,10 @@ stream catches up to the first chunk migration, the ``documentKey`` in the
 change stream notification document only includes the ``_id`` of the document,
 not the full shard key.
 
-Indexes and Performance
------------------------
+Indexes
+-------
 
 Change streams cannot use indexes. MongoDB does not support creating
 indexes on the :term:`oplog` collection. Therefore, avoid opening a high
 number of :ref:`specifically-targeted <changeStreams-watch-deployment>`
 change streams as these can impact server performance.
-
-Change Stream Optimization
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. |change-streams| replace:: change streams
-
-.. include:: /includes/change-streams-optimization.rst
-