eclipse-temurin: remove JDK16
eclipse-temurin: remove JDK16

JDK16 is no longer supported so there will be no further updates to the dockerfiles.

@tianon I assume that making this change won't remove the existing tags?
31z4/official-images,neo-technology/docker-official-images,neo-technology/docker-official-images,31z4/official-images,docker-library/official-images,docker-library/official-images,neo-technology/docker-official-images,neo-technology/docker-official-images,31z4/official-images,infosiftr/stackbrew,neo-technology/docker-official-images,infosiftr/stackbrew,docker-library/official-images,neo-technology/docker-official-images,infosiftr/stackbrew,31z4/official-images,neo-technology/docker-official-images,neo-technology/docker-official-images,docker-library/official-images,31z4/official-images,infosiftr/stackbrew,infosiftr/stackbrew,31z4/official-images,infosiftr/stackbrew,31z4/official-images,neo-technology/docker-official-images,neo-technology/docker-official-images,docker-library/official-images,docker-library/official-images,neo-technology/docker-official-images,docker-library/official-images,31z4/official-images,docker-library/official-images,infosiftr/stackbrew,neo-technology/docker-official-images,infosiftr/stackbrew,31z4/official-images,infosiftr/stackbrew,31z4/official-images,docker-library/official-images,infosiftr/stackbrew,infosiftr/stackbrew,docker-library/official-images,docker-library/official-images,docker-library/official-images,neo-technology/docker-official-images,docker-library/official-images,31z4/official-images,31z4/official-images,infosiftr/stackbrew,31z4/official-images,infosiftr/stackbrew,infosiftr/stackbrew,31z4/official-images,docker-library/official-images,neo-technology/docker-official-images