DOCSP-45312: Remove using directives/declarations (#79)

* DOCSP-45312: Remove using directives/declarations

* EC feedback

source/upgrade.txt

@@ -159,6 +159,15 @@ The v4.0 driver introduces the following breaking changes to the API:
   library equivalents. For context, see the :ref:`Build System Breaking Changes
   <version-4.0-build-system-breaking>` section.
 
+- Removes the following undocumented ``using`` directives and declarations:
+
+  - ``bsoncxx::builder::types`` from the ``<bsoncxx/builder/list.hpp>`` header file.
+    Instead, use ``bsoncxx::types`` from ``<bsoncxx/types.hpp>``.
+  - ``bsoncxx::builder::stream::concatenate`` from the ``<bsoncxx/builder/stream/helpers.hpp>``
+    header file. Instead, use ``bsoncxx::builder::concatenate`` from ``<bsoncxx/builder/concatenate.hpp>``.
+  - ``mongocxx::events::read_preference`` from the ``<mongocxx/events/topology_description.hpp>``
+    header file. Instead, use ``mongocxx::read_preference`` from ``<mongocxx/read_preference.hpp>``.
+
 ABI Breaking Changes in v4.0
 ````````````````````````````