This morning seems to be a roller coaster related to the Volt, stories said it was being cut, then people removed references to that, and now they're back to saying it will be cut. This Verge article[1] currently says production will end March 1, 2019 and Jalopnik agrees[2].
Obviously, they say they are focusing on electric. Maybe they are killing off the hybrid to focus on the purely electric. Maybe some new product will be released to replace it. It is far from clear at the moment.