cloud_create_image.yaml is used by Google Cloud build to build the docker images for the gem5 project. We no longer support Clang versions <6: https://gem5-review.googlesource.com/c/public/gem5/+/45621. As such we no longer need to build the image for Clang versions 3.9, 4, and 5. These were primarily used for the compiler tests, which have been updated to only test Clang versions >=6. Change-Id: I0c41cf0f189b4e24976f19a519018f3c9e87bb90 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45680 Reviewed-by: Gabe Black <gabe.black@gmail.com> Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>