Moved to DLP for faster response.
You do not need these versions in the master repository in order to uninstall them.
If your client task is set to remove DLP 9.3.5 or 9.3.6 (and I'm pretty sure that it also works with 9.4.x), it will remove these versions as well. So you can just add one of these in the Master Repository if not already there.
Of course if you are planning to upgrade them to you can just deploy 9.4.x on top of the old installation, no need to uninstall.
You should be able to do the same with most ePO deployed products