(Reuters) - Elon Musk is going offline from Twitter after questioning "the good" of the social networking site."Not sure about good of Twitter," the Tesla Inc Chief Executive Officer tweeted https://twitter.com/elonmusk/status/1190288216131170305 on Friday, following up with "going offline." Musk's Twitter account was not deactivated as of 1730 GMT. "Reddit still seems good," he said.The eccentric billionaire has a history of being playful with his Twitter account, one of corporate..