Clickbait: it's not like Google is removing their launcher from the Store, it's just Google Now Launcher being superseded by the Pixel Launcher.
I have a feeling that a (perhaps only slightly) more significant refactor is in the works, for example making the Google app itself the "official" launcher, or doing away with a separate "launcher" app altogether in favor of emphasizing the voice recognition capabilities.
EDIT: It looks like what Google is doing is actually making the Google Now card functionality available through a new Search Launcher Services API to official Android Partners: http://www.androidcentral.com/why-would-google-pull-google-n...
Any links for this? The Pixel Launcher is definitely not available on non-Pixel phones yet.