Remove "ros2 action type" from Humble/Iron. (#4291)

It was recently added to Rolling, but Humble and Iron
don't have it.  Remove the tutorial portion from humble
and iron.

Signed-off-by: Chris Lalancette <[email protected]>

source/Tutorials/Beginner-CLI-Tools/Understanding-ROS2-Actions/Understanding-ROS2-Actions.rst

@@ -226,22 +226,7 @@ Which will return:
 In brackets to the right of each action name (in this case only ``/turtle1/rotate_absolute``) is the action type, ``turtlesim/action/RotateAbsolute``.
 You will need this when you want to execute an action from the command line or from code.
 
-5 ros2 action type
-^^^^^^^^^^^^^^^^^^
-
-If you want to check the action type for the action, run the command:
-
-.. code-block:: console
-
-    ros2 action type /turtle1/rotate_absolute
-
-Which will return:
-
-.. code-block:: console
-
-    turtlesim/action/RotateAbsolute
-
-6 ros2 action info
+5 ros2 action info
 ^^^^^^^^^^^^^^^^^^
 
 You can further introspect the ``/turtle1/rotate_absolute`` action with the command:
@@ -263,7 +248,7 @@ Which will return
 This tells us what we learned earlier from running ``ros2 node info`` on each node:
 The ``/teleop_turtle`` node has an action client and the ``/turtlesim`` node has an action server for the ``/turtle1/rotate_absolute`` action.
 
-7 ros2 action interface show
+6 ros2 action interface show
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 One more piece of information you will need before sending or executing an action goal yourself is the structure of the action type.
@@ -292,7 +277,7 @@ The section of this message above the first ``---`` is the structure (data type
 The next section is the structure of the result.
 The last section is the structure of the feedback.
 
-8 ros2 action send_goal
+7 ros2 action send_goal
 ^^^^^^^^^^^^^^^^^^^^^^^
 
 Now let's send an action goal from the command line with the following syntax: