It was a polite term of, unfortunately I cannot provide an accurate ETA.
I will open the issue on Github so you track it progress.

It's a pity, the site is practically ready and the only problem is the date to be deleted in the articles. I do not understand in which file should be made the changes suggested by the link you indicated.

The file which needs to be changed is github.com/getk2/k2/blob/master/media/k2/assets/js/k2.backend.js#L501-L504
But it is not that simple, it needs to be tested across multiple browsers and Joomla! versions.