Lucid is eliminating 18 percent of its U.S. workforce, the second significant layoff for the nascent automaker this year.The company is also reducing production at its factory in Casa Grande, Arizona, in a bid to counteract its high inventory and save money.Marc Winterhoff, the chief operating officer, who also served as the interim CEO after the departure of Peter Rawlinson, has now left the company and Lucid is entirely eliminating the COO position.