(Reuters) -Billionaire Elon Musk said he paid a visit to Twitter Inc’s headquarters in San Francisco on Wednesday, ahead of a court-ordered deadline to close his $44 billion deal for the social media platform. “Entering Twitter HQ – let that sink in!” said the caption of a video that Musk tweeted in which he was walking into the Twitter office carrying a sink in his hands. Hours earlier, he hinted at being the company’s top boss after updating his profile’s bio to “Chief Twit”. Twitter confirmed Musk would visit the San Francisco office this week, but declined to comment further. Banks have st…