Remove Zookeeper 3.3.6

[dustinschultz]

3.3.6 distro doesn't exist at https://www.apache.org/dist anymore, only at https://archive.apache.org/dist

[tianon]

Is 3.3 still even supported? It seems like it was moved to archive.apache.org because it's EOL, in which case I think removing it here is probably more appropriate, right?

Removing it here (and in library/zookeeper) will remove it from the "Supported" section on the Hub readme (and will prevent us from spending cycles rebuilding it on the official build server), but the tag will still be available to users who want it. (See https://github.com/docker-library/official-images#library-definition-files for more detail on this.)

[dustinschultz]

Good question ... I can't find anything that explicitly says it's EOL. It has only been moved to "old versions".

The zookeeper JIRA has a 3.3.7 fix version with some issues in it but I don't see any tags related to it and the issues in it are from 2012.

I'd be +1 for removing it.

[31z4]

3.3.6 hasn't been updated in two years. I think we're safe to remove.

[dustinschultz]

👍 - PR has been updated to remove 3.3.6

[31z4]

Thanks!