Focal is being dropped upstream we need to remove the images from the library list

[tfoote]

docker-library/official-images#19167 (comment)

For both ROS and Gazebo.

[gavanderhoorn]

Will the Noetic images be 'migrated' to ros_legacy?

[mikaelarguedas]

A prerequisite for retiring the ROS image is doing one last build using the final snapshot apt packages.

Looks like we have 2 blockers to do so right now:

• The snapshot.ros.org APT repository GPG key is expired
• The final snapshot for noetic is not available yet

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Will the Noetic images be 'migrated' to ros_legacy?

If we do like the other distros, It will just be marked as "EOL" so not rebuilt anymore but will remain accessible as usual (docker pull ros:noetic-XX) and the Dockerfiles will stay at the same location

[mikaelarguedas]

The Noetic docker images are being retired in #819 and docker-library/official-images#19233

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For the gazebo ones: we need at least one distro for the templating machinery to work.
Either we retire the entire Gazebo machinery or we publish new Gazebo (ec-ignition #354) images.