Uber has withdrawn its financial guidance for 2020 - covering metrics like gross bookings, adjusted net revenue, and adjusted EBITDA.In a press release on its website, Uber said the guidance it published on February 6 no longer applied, as the "uncertainty" caused by COVID-19 made its results "impossible" to predict.The ride-hailing giant also warned that the value of some of its minority investments could be reduced by up to $2.2 billion in Q1 of 2020, as a result of worldwide coronavirus lockdowns.On Wednesday, driver advocacy group Rideshare Drivers United said that more than 2,500 Uber and Lyft drivers in California have filed wage claims against the companies since February.Visit Business Insider's homepage for more stories.Uber has withdrawn its 2020 financial guidance, as uncertainty