Why don't devs tell us when they are removing their game from steam?

Some games get removed because Valve removes them (The Stomping Land), and others because the project itself has failed. Another reason is a publisher not renewing a license ( the Deadpool game).

because theres NOTHING in it for them. if they're no longer making money from it (ie not renewing licence, or because the game has failed), why would they invest time and effort into publically telling people they're no longer selling it. They certainly don't expect it'll start a mad rush of interest, because if people DID care about the game, they wouldn't be pulling it from stores.

Maybe they're ashamed? Or want to do it covertly so there is no backlash? I have no idea.

Cause it's not important, why a game, which will be removed, should announce it? So they need to explain "why", and that's a thing dev's never gonna do, cause they are scared to loose more users then :p

better die quietly then scream it, just my thoughts

Because either
a) the game was not popular in the first place and the only people who would want it then are collectors and resellers
b) the game is taken down because of licensing issues, and they could be in a bit of a pickle if they go "we can't sell this anymore, go buy this quick plz"