DOCSP-15269 remove gettingstarted directive

Author: andf-mongodb

source/index.txt

@@ -42,8 +42,7 @@ functionality.
 Getting Started
 ---------------
 
-MongoDB provides a :gettingstarted:`Getting Started Guide </shell>` in
-the following editions.
+MongoDB provides a Getting Started Guide in the following editions:
 
 .. list-table::
    :class: index-table

source/mongo.txt

@@ -44,7 +44,8 @@ The list of methods supported by ``mongosh`` is here:
 
 .. seealso::
 
-   - :gettingstarted:`Getting Started Guide </shell>`
+   - :doc:`Getting Started Guide for the mongo Shell
+     </tutorial/getting-started>`
    - :binary:`~bin.mongo` Reference Page
    - :mongosh:`mongosh Documentation </>`
 

source/reference/mongo-shell.txt

@@ -560,7 +560,8 @@ Consider the following reference material that addresses the
 - :ref:`js-administrative-methods`
 - :ref:`database-commands`
 - :ref:`aggregation-reference`
-- :gettingstarted:`Getting Started Guide </shell>`
+- :doc:`Getting Started Guide for the mongo Shell
+  </tutorial/getting-started>`
 
 Additionally, the MongoDB source code repository includes a `jstests
 directory <https://github.com/mongodb/mongo/tree/master/jstests/>`_