Daniel D'Addario Chief TV CriticSpoiler alert: This article contains revelations about the plot of Season 2, Episode 8 of “The Morning Show.” Mitch Kessler is gone. And so is whatever point “The Morning Show” had been working, slowly, toward making.With the death by suicide of series-long quasi-antagonist Mitch (Steve Carell), “The Morning Show” has killed off the character whose misdeeds had kicked off its story, and the one whose punishment — or not — were its central concern.