It's one of the few things the EPA does that's useful and efficient. Setting a national standard is well within the things that government should do. Compared to all the really wasteful things they do this should certainly be kept.
Except it's the manufacturers that self-report their own idea of efficiency, essentially self-awarding themselves this meaningless label. You'll recall the famous experiment where someone sent in an Energy Star application featuring their design for a gasoline powered alarm clock. Which was of course granted Energy Star status, not only sight-unseen, but obviously without even a moment's critical thinking on the part of whatever bureaucratic clerk is holding the exact job that Trump very reasonably considers a waste of your taxes. If consumers want a real standard, they should embrace something the Underwriters Laboratories standard for safety. Privately run, and rigorous.