DOCSP-21486-aggregation-map-reduce (#803)

* DOCSP-21486-aggregation-map-reduce

* DOCSP-21486-aggregation-map-reduce

Co-authored-by: jason-price-mongodb <[email protected]>

Author: jason-price-mongodb

source/aggregation.txt

@@ -1,6 +1,6 @@
-===========
-Aggregation
-===========
+======================
+Aggregation Operations
+======================
 
 .. default-domain:: mongodb
 
@@ -21,17 +21,13 @@ results. You can use aggregation operations to:
 
 To perform aggregation operations, you can use:
 
-- :ref:`Aggregation pipelines <aggregation-pipeline-intro>`, which are the
-  preferred method for performing aggregations.
+- :ref:`Aggregation pipelines <aggregation-pipeline-intro>`, which are
+  the preferred method for performing aggregations.
 
 - :ref:`Single purpose aggregation methods
   <single-purpose-agg-methods>`, which are simple but lack the
   capabilities of an aggregation pipeline.
 
-- :ref:`Map-reduce operations <aggregation-map-reduce>`, which are
-  deprecated starting in MongoDB 5.0. Instead, use an aggregation
-  pipeline.
-
 .. _aggregation-pipeline-intro:
 
 Aggregation Pipelines
@@ -46,15 +42,22 @@ Aggregation Pipeline Example
 
 For runnable examples containing sample input documents, see
 :ref:`Complete Aggregation Pipeline Examples
-<aggregation-pipeline-examples>`.
+<aggregation-pipeline-examples>`. 
+
+Learn More About Aggregation Pipelines
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To learn more about aggregation pipelines, see
+:ref:`aggregation-pipeline`.
 
 .. _single-purpose-agg-methods:
 
 Single Purpose Aggregation Methods
 ----------------------------------
 
-You can use the following single purpose aggregation methods to
-aggregate documents from a single collection:
+The single purpose aggregation methods aggregate documents from a single
+collection. The methods are simple but lack the capabilities of an
+aggregation pipeline.
 
 .. list-table::
    :header-rows: 1
@@ -75,39 +78,10 @@ aggregate documents from a single collection:
      - Returns an array of documents that have distinct values for the
        specified field.
 
-The single purpose aggregation methods are simple but lack the
-capabilities of an :ref:`aggregation pipeline 
-<aggregation-pipeline-intro>`.
-
-.. _aggregation-map-reduce:
-
-Map-Reduce
-----------
-
-.. include:: /includes/fact-use-aggregation-not-map-reduce.rst
-
-For a feature comparison of aggregation pipelines and map-reduce, see
-:doc:`/reference/aggregation-commands-comparison`.
-
-Learn More
-----------
-
-To learn more about aggregations, see:
-
-- :ref:`aggregation-pipeline`
-
-- :ref:`aggregation-expression-operators`
-
-- :ref:`aggregation-pipeline-operator-reference`
-
-- `Practical MongoDB Aggregations
-  <https://www.practical-mongodb-aggregations.com>`_
-
-
 .. toctree::
    :titlesonly:
    :hidden:
 
    /core/aggregation-pipeline
-   /core/map-reduce
    /reference/aggregation
+   /core/map-reduce