DOCS-14640 removes deprecated slaveOk option

Author: jmd-mongo

source/mongoexport.txt

@@ -750,19 +750,6 @@ Options
    See :ref:`mongoexport-noHeaderLine-example` for sample usage.
 
 
-.. option:: --slaveOk, -k
-   
-   Sets the :ref:`replica-set-read-preference` to :readmode:`nearest`,
-   allowing :binary:`~bin.mongoexport` to read data from secondary
-   :term:`replica set` members.
-   
-   :option:`--readPreference` replaces ``--slaveOk`` in MongoDB 3.2. You cannot
-   specify ``--slaveOk`` when :option:`--readPreference` is specified.
-   
-   .. include:: /includes/warning-read-preference-mongos.rst
-   
-
-
 .. option:: --readPreference=<string|document>
 
    *Default*: :readmode:`primary`