Remove pre-configured Webots images for Rolling and Iron (#3794) (#3796)

* remove pre-configured for iron and rolling

(cherry picked from commit a053856)

Co-authored-by: Yannick Goumaz <[email protected]>

source/Tutorials/Advanced/Simulators/Webots/Installation-MacOS.rst

@@ -39,7 +39,6 @@ A shared folder allows the script to transfer the world and other resource files
 
 The following steps explain how to create the VM image with the installation of the ``webots_ros2`` released package.
 It is also possible to install it from sources.
-In the :ref:`Preconfigured Images` section, you can find already configured images for every release of Webots (starting from R2023a) to download.
 
 1 Create the VM image
 ^^^^^^^^^^^^^^^^^^^^^^
@@ -207,26 +206,3 @@ Use the ROS 2 launch command to start demo packages (e.g. ``webots_ros2_universa
         ros2 launch webots_ros2_universal_robot multirobot_launch.py
 
 If Webots is closed or the ROS 2 process is interrupted, the local server will automatically wait for a new package launch and the shared folder will be cleaned for the next run.
-
-.. _Preconfigured Images:
-
-Pre-configured Images
------------------------
-
-If you don't want to setup the VM from scratch, the following links provide you with pre-configured UTM images for each version of Webots.
-The ``webots_ros2`` version is installed from the official repository (not from sources) and is typically the first one that is compatible with the corresponding Webots version.
-You are welcome to download an image and upgrade the package, or install it from sources if necessary.
-
-* `Version 2023.0.2 for Webots R2023a <https://cyberbotics.com/files/ros2/webots_ros2_2023_0_2.utm.zip>`_ [6.6 GB]
-
-When adding the downloaded image to the UTM software, you should also choose the path to the host shared folder before starting the VM in the drop-down menu (e.g. ``/Users/username/shared``).
-Once the VM is started, the ``WEBOTS_SHARED_FOLDER`` environment variable must always be set for the package to work properly in the virtual machine (VM).
-This variable specifies to the ``webots_ros2`` package the location of the shared folder that is used to exchange data between the host machine and the VM.
-The value for this variable should be in the format of ``<host shared folder>:<VM shared folder>``, where ``<host shared folder>`` is the path to the shared folder on the host machine and ``<VM shared folder>`` is the path to the same shared folder on the VM.
-
-In the pre-configured images, ``WEBOTS_SHARED_FOLDER`` is already set in ``~/.bashrc``.
-You will need to update it to use the correct path for the host folder:
-
-.. code-block:: console
-
-    export WEBOTS_SHARED_FOLDER=/Users/username/shared:/home/ubuntu/shared