A backward compatibility code handling the conversion of VMDK image to
stream-optimized sub-format has been kept in the implementation since
PR#2529 [1] merged on May 4th 2022. Since this change, no API
implementation is submitting jobs, which would hit this conversion code,
because VMDK images are already being produced in the desired
sub-format.
On-premise deployments are expected to use the same composer and worker
versions. There are no composer / worker instances in production, which
are not running the modified code.
Delete the backward compatibility code.
[1] https://github.com/osbuild/osbuild-composer/pull/2529
95e2e75851