Remove oem_supported() and its branches: the configurator always offers OEM install now, rather than scanning the offline mirror's runtime package to decide. Building an ISO against a runtime that ships OEM support is the build's responsibility; the orchestrator still fails an OEM install with a clear error if the staged target somehow lacks omarchy-oem-setup. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>