docsp-31720 - remove deprecated helpers (#729)

Author: mongoKart

source/upgrade.txt

@@ -51,6 +51,17 @@ planned upgrade version. For example, if you are upgrading the driver
 from v3.x to v5.x, address all breaking changes listed under v4.x and
 v5.x.
 
+.. _node-breaking-changes-v6.x:
+
+Version 6.x Breaking Changes
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- The driver removes support for the ``addUser()`` helper command. Use the
+  :manual:`createUser </reference/command/createUser>` MongoDB Shell command instead.
+- The driver removes support for the ``collStats`` operation. Use the
+  :manual:`$collStats </reference/operator/aggregation/collStats>` aggregation operator
+  instead. 
+
 .. _node-breaking-changes-v5.x:
 
 Version 5.x Breaking Changes

source/whats-new.txt

@@ -12,6 +12,8 @@ What's New
 
 Learn what's new in:
 
+* :ref:`Version 6.0 <version-6.0>`
+* :ref:`Version 5.7 <version-5.7>`
 * :ref:`Version 5.7 <version-5.7>`
 * :ref:`Version 5.6 <version-5.6>`
 * :ref:`Version 5.5 <version-5.5>`
@@ -39,6 +41,19 @@ Learn what's new in:
 * :ref:`Version 3.7 <version-3.7>`
 * :ref:`Version 3.6 <version-3.6>`
 
+.. _version-6.0:
+
+What's New in 6.0
+-----------------
+
+The {+driver-short+} v6.0 release includes the following features:
+
+- Removes support for the ``addUser()`` helper command. Use the
+  :manual:`createUser </reference/command/createUser>` MongoDB Shell command instead.
+- Removes support for the ``collStats`` operation. Use the
+  :manual:`$collStats </reference/operator/aggregation/collStats>` aggregation operator
+  instead. 
+
 .. _version-5.7:
 
 What's New in 5.7