The head of Jeff Bezos’ family office has left the board of directors of Slate Auto, the electric vehicle startup backed by the Amazon founder, according to numerous state filings reviewed by TechCrunch. Melinda Lewison, who leads investments at Bezos Expeditions, appears to have stepped down at some point in the last few months, documents filed with the Delaware, Florida, and Massachusetts secretaries of state show. That leaves Bezos with no direct representation on Slate’s board as the