Tesla is to axe production of two electric vehicle (EV) models as part of a shift towards robotics after the company reported its first ever decline in annual revenue. Chief executive Elon Musk told analysts on a conference call that the company would stop selling its older Model S and Model X vehicles and convert factory space to manufacture its Optimus robots instead. Tesla revealed that investment would more than double this year to $20bn (£14.5bn), with $2bn of that sum going to his