After announcing that former Republican National Committee Chairman Ronna McDaniel would contribute “across all NBC News platforms,” network executives have backed down following backlash and threats of a boycott from viewers and employees, decreeing that McDaniel will not appear on MSNBC. In a hastily drafted memo, Rashida Jones, the cable network’s president, told employees the cable network has no plans to have McDaniel on the channel, according to people familiar with the conversations, the Wall Street Journal reported. MORE: Boycott! NBC, MSNBC face threats from most influential viewers a…